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I have a intertherm Furnace Model E1EH 015HA. During the

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Hello, I have a intertherm...
Hello, I have a intertherm Furnace Model E1EH 015HA. During the 2014 winter the heating elements quit working. I decided to do replace the limit switches, the relay, and the fan relay to see if it would fix the problem and Now I ended up with a bigger problem. As soon as I flip the breaker back to on position the heating elements start instantly. Even when the thermostat is on the off position. It seems to me like I may have crossed some wires. I was very careful not to do that, I replaced components one at a time and switched cable by cable carefully on to the new component. I need help resolving this problem, I would really appreciate it.
Submitted: 2 years ago.Category: HVAC
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Answered in 40 minutes by:
10/7/2015
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 9,168
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial
Verified

Hello, please attach a clear, well lit, well focused photo of the furnace wiring diagram here, and a few photo's of the actual wiring you worked on, taken at different angles and from at least 24 inches away, so that I can see whats going on.

Use the paper clip icon above, or the +attach files link to the right of the send button.

I will mark those up with test instructions.

We can go from there.

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Customer reply replied 2 years ago
Thanks. I hope this helps. I had to disconnect the breakers so that i could take the picture.
anyone-wireing-diagram-n...jpganyone-...jpgIMG_5893.jpgIMG_5893.jpgIMG_5894.jpgIMG_5894.jpgIMG_5895.jpgIMG_5895.jpgIMG_5896.jpgIMG_5896.jpgIMG_5898.jpgIMG_5898.jpgIMG_5899.jpgIMG_5899.jpgIMG_5901.jpgIMG_5901.jpgIMG_5902.jpgIMG_5902.jpg
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago

Hello again,

http://screencast.com/t/gfjXwSslUa

http://screencast.com/t/uyGVGlExbXF

So far it sounds like you have made a wiring error, probably because of the complexity of the parts you installed and often vague terminal markings. Sorting that out will not be easy in most cases.

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Customer reply replied 2 years ago
Hi, Just got home from work and did what you asked. Still comes on instantly. and it reads 240v
HVAC Technician: Phil, Mechanical Engineer replied 2 years ago

Hello again, in that case the odds that I will be able to help you effectively on line hear are slight. Hold your rating and I will opt out so that other experts here can take a look at this situation.

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 8,798
Experience: Furnace, A/C and heat pump specialist.
Verified

Do you have a volt meter for troubleshooting?

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Customer reply replied 2 years ago
I do.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Excellent. Now look at the very bottom of the sequencers and tell me what color wires you have going to the COILS on sequencer.I am showing on diagram that we should have a white to one a blue to one and then the common black /white to the other side of both coils.Please verify

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago
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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK with power ON and white disconnected from thermostat, check between blue and black/white for 24v and between white and black/white on each side of coil.

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Customer reply replied 2 years ago
Reads 14V.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Should not have anything. You did mean 14, not 24 though right?

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Customer reply replied 2 years ago
Yeah. 14.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

14 still should not be enough to energize element.The coil should not pull in until it gets at least 24v.But just for fun remove the white and the blue (Tape or move so they don't touch anything) and see if element goes off

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Customer reply replied 2 years ago
The elements come on with the blue and white disconnected.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK I am thinking the sequencer is stuck closed. Can you tell which or if all elements are coming on?

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Customer reply replied 2 years ago
The elements on top. The bottom elements don't get red.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK just so we know it is not a wiring issue, tell me for sure this is how it is wired.

Red from breaker to limit and then to element.

Black from breaker to sequencer terminal and then from sequencer terminal straight across to element.

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Customer reply replied 2 years ago
That is correct.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK our problem is going to be the sequencer.It is stuck in "closed position) allowing voltage to the element at all times. You can pick one up a any local appliance parts store fro around 20 bucks.

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Customer reply replied 2 years ago
Thank you for your help. I will go buy tomorrow morning. Is there anyway to disable the element so that I can run my A/C tonight?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Absolutely. Simply pull one of the wires (Either black from sequencer or red from breaker loose and tape it off with electrical tape. Turn breaker off first of course.

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Thanks for letting me work with you.When we are finished, if my answer has been polite, professional,and thorough, please click one of the ratings . If you still need help let me know!.Expert is not paid for assisting you until you rate answer.Feel free to follow up for 30 days at no additional cost. Bonus always appreciated if you feel justified.

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Customer reply replied 2 years ago
Thank you. There are three red wires comming out of the breakers. Should I pull all out or just one? When I pull one. The middle elements turn on.
Customer reply replied 2 years ago
The sequencer came apart when I tried to pull the wire.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

The fact that is came apart verifies it was definitely bad.

Now as for the replacement this is pretty simple.

I would go ahead and replace both of them.

JUst remember the sequencers are exactly what it says, bring elements on in sequence.

Note which wires go to the blower relay and the elements.

On the single relay, we are only feeding one element. So we will just move the wires from the old to the new in same location.

On the double stack,we want the blower relay and one element going to the top post and the other element going to the next post down.

Once you get new one, I will be happy to guide in connecting

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Customer reply replied 2 years ago
Ok, so the replacement will work even if it doesn't look the same?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Yes.Just make sure it has a 24v coil and that you put wire that goes to fan relay on top post so blower is energized with first element.

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Customer reply replied 2 years ago
Ok. So I have the sequencers and I am ready to install.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Can you send pic of new ones?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Excellent now a pic from side showing me M numbers

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK so I am clear. on the double stack is 1/4 and 1/3 and on single stack is 6/5?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK numbering is a bit strange. WE are going to wire up and then turn on.We may have to change one wire at that point as we want to make sure blower does come on with first element OK?

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Customer reply replied 2 years ago
Ok
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Lets start with the low voltage wires.

Put the small black ands white wires from old coils to new coils

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Next lets do the single stack.

From the breaker that fed the single stack on old one, put black from breaker to M6

Then the black from one heating element to M5

Then we have 2 blacks coming from other breaker.

Put then on M1 and M4

Then the 2 blacks to the other 2 elements to M3 and M5

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Customer reply replied 2 years ago
Ok so I am left with a yellow and a black. Yellow comes from the blower switch. And black from transformer
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK Yellow we want to first try on M5 (WE may move if blower doesn't come on with first element)

AS for the black to transformer we need to make sure it goes to the terminal supplied by same breaker as the other hot wire to tansformer.

From what I am seeing, it supplied by the breaker with2 elements. So that would be M1

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Customer reply replied 2 years ago
M1 only has one prong. Do I need an adapter y prong?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Do you see the other power leg to transformer? My diagram shows it RED? IF so all we need to do is make sure that red and black get power at all times from same breaker (12ov each leg). Technically it could go directly to breaker

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Customer reply replied 2 years ago
Ok. I just connect it directly to tge breaker.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

THat is fie. Then we will power up and make sure no elements or blower come on. If not that is good, then call for heat and see if blower and first element come on together.

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Customer reply replied 2 years ago
Elements not on just blower.
Customer reply replied 2 years ago
At first power up nothing came on. Then when I called for heat blower came on elements not comming on.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

No elements?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

But blower on before e call for anything?

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Customer reply replied 2 years ago
Blower came on after I switched the thermostat to heat.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK one element should also come on with blower, then second and then third.

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Customer reply replied 2 years ago
This is the same issue I was having last winter. That's when I decided to replace the limit switches.
Customer reply replied 2 years ago
But that's when the sequencer failed and I put the old limit switches back. Should I try the new ones?
Customer reply replied 2 years ago
I installed the new ones but same result. Elements are not comming on
Customer reply replied 2 years ago
Hi. Sorry for the long pause. I had to go out of town and just got back. I started testing. I get 240 from breaker to the sequencer but nothing comming out to element from sequencer.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Make sure thermostat is calling for heat and check 24v at the coil on bottom of sequencer

http://i.imgur.com/IpSSkEO.png

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Customer reply replied 2 years ago
No reading there.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK lets go to thermostat wires(just to make sure thermostat is not issue.). connect R and W together and see if we get 24v to sequencer coil.

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Customer reply replied 2 years ago
Ok. So when I put those two wires together elementa came on. Right away. Do I have the wrong thermostat installed?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Possibly. Tell me what thermostat you have.It could be in a setting

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Customer reply replied 2 years ago
Hunter model 44277.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Do you have a heat pump connected to thi air handler?

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Customer reply replied 2 years ago
I had a new unit installed a year ago.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok this is the issue, The thermostat is not designed to work with a heat pump with aux heat strips. On call for heat we only energize the heat pump. You ill need a two stage heat/single stage cool thermostat to bring the elements in.

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Customer reply replied 2 years ago
Is that a rare thermostat. I don't see many choices... any suggestions on wich to get?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

No the 2 stage heat/single stage cool can be purchased at Lowes or Home Depot beginning at about 35 bucks depending on how sophisticated you want to get such as programmable,touch screen all the way up to wi fi.

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago
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Customer reply replied 2 years ago
Ok. I am getting one tomorrow.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Thanks for letting me work with you.If my answer has been polite, professional,and thorough, please click one of the ratings before you go. If you still need help let me know!.Expert is not paid for assisting you until you rate answer.Feel free to follow up for 30 days at no additional cost. Bonus always appreciated if you feel justified.Let me know how it goes.Also if you need any help setting up or wiring I am here.

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Customer reply replied 2 years ago
I purchased a wifi model, that needs a "C" wire. am i going to be able to use this with my heat pump? the model is RTH6500WF.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Is there an unused wire in the bundle at thermostat maybe pushed back in wall ? If so we will need to connect it to C at thermostat and common in air handler. If not, you have a couple of choices. One is to run an extra wire and the other is to sacrifice the FAN ONLY feature .I will explain how to do that if you choose.

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Customer reply replied 2 years ago
I will check as soon as I get home. I believe there was a brown wire that was not connected and i pushed it back when I installed the wrong thermostat the (Hunter) model. I have never used the Fan Only feature, if we need to do that then no problem there.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Let me know when you get home and we will go from here. By the way I think you will love the 6500

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Customer reply replied 2 years ago
Ok. I am home now. Can you help me wire the new thermostat please.
Customer reply replied 2 years ago
No additional wire I only have r, y, w, o, and g.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok do you want to run an extra wire or sacrifice the Fan Only feature?

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Customer reply replied 2 years ago
For now, I will just sacrifice the fan only feature. I will run a new wire in the future.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK now do you know which wire in the furnace is the "common" low voltage wire?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

It should be going C in your outdoor heat pump

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Customer reply replied 2 years ago
Ok. I went to the unit outside and the blue cable is the common. Then where the air handler splices it is the green wire. So I am thinking the greeg wire labeled g is the common.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK what we want to do is disconnect the green wire from G at thermostat and where it currently goes to fan relay in air handler. Move it over to C at thermostat and connect it with the "Common" going outside at air handler. Then you will need to make a short jumper at thermostat from Y to G so blower is energized on call for heat or cool.

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Customer reply replied 2 years ago
How can I tell which wire is comming from the outside unit they both same color?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Sorry for delay website would not load.Let me look at this clos;ey.It looks kike your green from thermostat may be going to the blue outside yes?

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Customer reply replied 2 years ago
tge common wire is blue from outside unit. What I can't tell is which wire is the one that comes from the outside unit and which goes to thermostat?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK I think you have them backwards Tell m if that gray is going to the fan relay.I think it is

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Customer reply replied 2 years ago
The green wire connects to grey pigtail. And into fan relay.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK here is what we need to do.It will require a bit of work, but well be well worth it when we are done. I am going to have you disconnect wires at air handler and in outdoor unit and move a couple at thermostat. We are going to start fresh and get this all wired properly.

Now the set on the right in picture marked outdoor on the pic you sent are really from thermostat and ones on left marked thermostat really go outside.

I want you to wire everyting as explained below:

Blue from O at thermostat to Blue outside O

Red from RH/RC at thermostat to both red in air handler and red outside R

Yellow from Y at thermostat to gray in air handler and yellow to outdoor Y

White from W2 at thermostat to both white in air handler and white outside W

Green from C at thermostat to Black in air handler and Green going outside C

Go outside and wire as follows.

Blue to O

Red to R

Yellow to Y

White to W

Green to C

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Customer reply replied 2 years ago
Ok. Done. Now when I plug in the thermostat, the thermostat does not stay on
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Do you have breaker on to furnace?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

And did you turn it off while doing the wiring?

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Customer reply replied 2 years ago
I do have a breaker at the furnance and it didn't cut off when I plugged in the thermostat
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Was it off while you were doing the wiring and if not did any wires spark?

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Customer reply replied 2 years ago
I did cut everything off when doing the wiring.
Customer reply replied 2 years ago
I turned all the breakers off when doing the wiring. I have three different set of breakers. Turned all of the off. When I tuned them back on after doing the wiring the thermostat just cuts on and off continusly.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok so right now all breakers are on?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

What do you mean cuts on and off.? The display on thermostat or the unit?

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Customer reply replied 2 years ago
All breakers are on.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

What do you mean cuts on and off.? The display on thermostat or the unit?

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Customer reply replied 2 years ago
The thermostat.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Display?

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Customer reply replied 2 years ago
the display
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok remove front of thermostat and put meter on the C and R and tell me if voltage is cutting in and out

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Customer reply replied 2 years ago
27.41
Customer reply replied 2 years ago
No it is continuous. Stays at 27.41
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok we should have wiring right. Do you have a jumper or a pair of needle nose pliers handy?

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Customer reply replied 2 years ago
Ok. It stopped doing that. Now the display stays on.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK have you gone through the setup menu to match thermostat to system

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

If you have the new thermostat installed, go to setup menu and set as follows

Then you will need to go to the setup menu and set as follows

1=5

2=0

3=1

5=9

6=9

Any other functions are at your discretion.

If any functions listed do not show available, this means thermostat has setup based on a previous selection.

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Customer reply replied 2 years ago
I just set it up just like you said. It skipped over 2 and 3.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok lets see if it will work

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Customer reply replied 2 years ago
Just wating for it to kick in. Nothing is happening.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Is heat or Cool either one flashing?

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Customer reply replied 2 years ago
The heat was flashing but nothing came on. No coils or fan. I just now set it to cool. Says cool on flashing but the air handler not comming on
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok the flashing is a five minute delay, We have to wait until Heat and Cool are on solid before anything will come on

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Customer reply replied 2 years ago
Oh ok. Let me set it on heat then.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Standing by. Raise thermostat at least 5 or six degrees above room temp so heat pump and elements will both come on

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Customer reply replied 2 years ago
Still flashing heat on
Customer reply replied 2 years ago
No response from elements or fan
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Still flashing after 5 minutes?

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Customer reply replied 2 years ago
Yeah
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Hmm that is not normal. Lets do this though just to make sure wiring is all good. Take a jumper or a pair of needle nose and touch the following terminals together on thermostat.

R and Y- Blower and outdoor unit should come on

R and Aux/E /W2 - elements should come on

R and O/B = reversing valve in outdoor should swish

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Customer reply replied 2 years ago
Just kicked in . Everything seems to be working now.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Did you try heat and cool?

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Customer reply replied 2 years ago
I am trying cool right now
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Standing by

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Customer reply replied 2 years ago
Says cool on but still blowing hot air and the pipes at the A coil are hot
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Ok lets look again at settings. With 5 selected as function one we really should have a choice on function two. That is what determines when reversing valve is energized.

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Customer reply replied 2 years ago
Number one under choices should it be 7? 2 heat stages/ 1 cooling?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

No 7 is not for a heat pump. the only two choices for a heat pump are 1 and 5. One being with no backup heat and 5 being with backup heat

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Customer reply replied 2 years ago
Earlier I meant to say 3 and 5 are skipped after selecting 1 at option 2
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK you got 2 set to 0?

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Customer reply replied 2 years ago
2 set to 0 skips all the way to 6 as well
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK did you have 2 set to 0 earlier when warm AIR WAS BLOWING IN COOL MODE AND IF SO IS YOUR OUTDOOR UNIT A RHEEM OR Ruud?

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Customer reply replied 2 years ago
Grandaire
Customer reply replied 2 years ago
Yeah. It is set to 0 now and still blowing hot air on cool mode
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

And you have the blue wire on O/B at thermostat?

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

And can you verify blue is connected to O in outdoor unit?

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Customer reply replied 2 years ago
It is.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK every Grandaire I have seen reverses in Cool mode, but just to be sure, lets try selecting 1 for function 2 and see if maybe yours reverses in heat like a Rheem/Ruud

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Customer reply replied 2 years ago
Ok. I just set it to 1 an it is still hot.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK it sounds like for some reason you are either not getting 24v to the reversing valve coil or the coil is not energizing valve. I am about to leave office for the night, but we can pick up here tomorrow if you would like.

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Customer reply replied 2 years ago
Ok. Thanks. We will continue tomorrow. Thanks for all the help.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Look forward to continuing. First thing will do is go ahead and change function 2 back to O. Then look in outdoor unit and make sure reversing valve is plugged in. If so, turn thermostat to cool and unplug revering valve plug from solenoid., stick probes in connector and see if we are getting 24 volts at that solenoid.

http://i.imgur.com/IGVlpjT.png

http://i.imgur.com/Hk0QyCD.jpg

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Customer reply replied 2 years ago
Hi there. You think I may have a bad thermostat. Nothing comes on now. No heat or ac. It just keeps flashing the cool or hrat mode forever
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Sounds like thermostat definitely has an issue,It should not flash more than 5 minutes. Lets connect the red, blue and Y together at thermostat and see if we get air handler blower, and then at outdoor unit if we are getting 24v between the blue and green and yellow and green.

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Customer reply replied 2 years ago
By connecting those 3 wires, only the blower works. Is that what is suppose to happen?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Blower should run and outdoor unit should run in cool mode if you have wires as I instructed.

Red to R

Yellow to Y

Blue to O both at thermostat and in outdoor unit.

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Customer reply replied 2 years ago
Only the blower works when I put this wires together. The outside unit doesn't turn on.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

The wires may not be making good connection or there is a break in them somewhere between thermostat and outdoor unit.or no high voltage power to outdoor unit

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Customer reply replied 2 years ago
I think it is a good idea if I run new 5 conductor wire. I am going to the hardware store after work today and picking it up.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Wire as follows

Blue from O at thermostat to Blue outside O

Red from RH/RC at thermostat to both red in air handler and red outside R

Yellow from Y at thermostat to gray in air handler and yellow to outdoor Y

White from W2 at thermostat to both white in air handler and white outside W

Green from C at thermostat to Black in air handler and Green going outside C

Go outside and wire as follows.

Blue to O

Red to R

Yellow to Y

White to W

Green to C

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Customer reply replied 2 years ago
Finished the wiring. Is it possible that the reversing valve is stuck or burned out?
Customer reply replied 2 years ago
It does click. And reads 17.87 volts
Customer reply replied 2 years ago
I am wrong. I heard a clicking but it is not from selenoind.
Customer reply replied 2 years ago
Do you think the defrost board could be bad? Maybe I accidentally crossed some wires and burned out something?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Heck voltage in and out of board to verify you are getting accurate reain.17.8 is not enough to pull in solenoid.If 24 in but not out of board could be a bad defrost board

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Customer reply replied 2 years ago
yeah, I ordered a defrost board already, I think that's where the roblem is. It the defrost board is not working for cooling, will it also have an effect on the heating?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Yes everything goes through the defrost board.

Thanks for letting me work with you.If my answer has been polite, professional,and thorough, please click one of the ratings before you go. If you still need help let me know!.Expert is not paid for assisting you until you rate answer.Feel free to follow up for 30 days at no additional cost. Bonus always appreciated if you feel justified.

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Customer reply replied 2 years ago
The heat is working fine, as far as heating goes, i don't know if there may be something that the unit outside does when it gets colder outside on the heating mode that may effect it in colder temperatures?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Reversing valve need to shift back and forth when it goes into defrost to melt ice from coil.

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Customer reply replied 2 years ago
ok, I ordered a defrost board, should get it by Saturday. I am at work right now, but when i get home i will check the voltage going in. incase the voltage going in is not 24v, what else could it be?
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Let me now and we will go from here.

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Customer reply replied 2 years ago
ok. thanks.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

You're welcome.Look forward to hearing back

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Customer reply replied 2 years ago
I received the new board and installed it. Still no luck. Still heats in cool mode.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK check now at that reversing valve solenoid to see if we are now getting 24 volts to it.

http://i.imgur.com/BFjV9JY.jpg

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Customer reply replied 2 years ago
No. Nothing. Reads 0 volts.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Do you have 24 v into the defrost board and thermostat set to COOL and lowered below room temp?

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Customer reply replied 2 years ago
Ok. Getting 24v going in.
Customer reply replied 2 years ago
Yeah. Those two orange wires go to the solenoid.
Customer reply replied 2 years ago
Disconnecting the wires at the solenoid. I test and it is giving me 19.27
Customer reply replied 2 years ago
The solenoid reads 14.8 ohms
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

Sorry about the delay.My daughter stopped by with my grandkids.We want to check voltage between the wires going to solenoid with thermostat calling for COOL.

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HVAC Technician: airheatman, HVAC Technician replied 2 years ago

19.27 is not enough to energize solenoid. Check going into defrost board between the C wire and Y wire.

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Customer reply replied 2 years ago
At y and c I get 24v.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK there is an issue somewhere between the wires into board and the reversing valve. We should be getting 24v out of board to solenoid.Did you have the solenoid unplugged?

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Customer reply replied 2 years ago
Yeah. I had the solenoid unplugged and the leads inserted into the plug
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

OK is there anything between the board and the solenoid that could be draining power?

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Customer reply replied 2 years ago
Not that I can tell. The wires just run straight from board to solenoid without branching of to anything else.
HVAC Technician: airheatman, HVAC Technician replied 2 years ago

I am going to have to leave for dinner.I am going to open this to other experts. Please stand by to see if someone can assist you. have opted out of the question to see if perhaps other experts may have more information and can assist.Please do not rate or reply as that will send question back to my desk.Please stand by to see if another expert can assist further.

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Customer reply replied 2 years ago
Ok. The cooling was working. Could it be something at the air handler that may be not wired properly?
Customer reply replied 2 years ago
Today, it got to 30℉. I went outside to check out the unit thinking it may have frost on it, but the defrosting mode works and i could hear the reversing valve switching. Do you know why this may be working, but not the Cooling mode?
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airheatman
airheatman, HVAC Technician
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