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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 5648
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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I need help! I have a Goodman furnace and ac with a totaling

Customer Question

I need help! I have a Goodman furnace and ac with a totaling P474-1100REC wireless thermostat, nothing working at all. I get a status good light on the furnace buy nothing happens. There is no power light on the receiver
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Can you give me complete model from inside furnace in burner compartment so I can provide guidance with this specific unit.Model will be on a label just above burners on right or left inside panel

http://i.imgur.com/U8b0GXT.jpg

Customer: replied 1 year ago.
GMH950703BXAC
Expert:  airheatman replied 1 year ago.

Remove furnace panel and hold or tape door switch in and then check between R and C on furnace board and let me know if you have 24 volts ac.

Customer: replied 1 year ago.
I have to go get my meter, give me some time, it's at work
Expert:  airheatman replied 1 year ago.

Take your time.Come back here when ready and we will go from here.

Customer: replied 1 year ago.
No voltage,
Expert:  airheatman replied 1 year ago.

Ok look on control board for a small 3 amp auto type fuse and see if it is blown

http://i.imgur.com/kYe4Epz.png

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

Customer: replied 1 year ago.
Replaced fuse , same results, however, fan starts now when I reive the fuse , LED flashes 6 times
Customer: replied 1 year ago.
Still no power light to receiver
Expert:  airheatman replied 1 year ago.

Look and see if fuse blew again.If not check the flame rollout switch above and beside burners to see if red button in center will push in to reset

Customer: replied 1 year ago.
Fuse is good,cannot locate red reset
Expert:  airheatman replied 1 year ago.

Resettable limits will be near burners. Part 151 in picture below

Customer: replied 1 year ago.
Doesn't resemble what I have, how can I send a pic?
Expert:  airheatman replied 1 year ago.

If you have a paper clip icon on your page you can attach using that link.Or

You can upload the pictures using the tiny pic site .

Here is a link to the site.

http://tinypic.com/

Click on Browse , select the file from your folder.then click UPLOAD NOW.

They will give you a quote to enter in the box to verify you are a human.Enter the quote and click UPLOAD NOW

You will see your picture on right side of screen.

Then copy the link URL for email & IM

Paste that link here on the site.

Customer: replied 1 year ago.
Pics
Expert:  airheatman replied 1 year ago.

See picture below,red buttons should push in if one is tripped

Customer: replied 1 year ago.
Not tripped
Expert:  airheatman replied 1 year ago.

Ok turn power off and back on to furnace and see if code goes away.

Customer: replied 1 year ago.
Receiver
Customer: replied 1 year ago.
Vide goes away, but nothing happening
Customer: replied 1 year ago.
Code
Expert:  airheatman replied 1 year ago.

Check between R and C on board again and between R and C where wires connect to receiver

Customer: replied 1 year ago.
If I remove fuse and reinstall, the blower and fan start, shortly after, the fan faults out. The blower continues to run, sometimes pauses for what sounds like contacts opening ang closing.
Customer: replied 1 year ago.
I have DC voltage from transformer
Customer: replied 1 year ago.
My mistake, 24vac at tranformer
Customer: replied 1 year ago.
I have 24vac out on r and c on the main board, still no voltage on receiver
Customer: replied 1 year ago.
I have 22 vac across guse
Customer: replied 1 year ago.
Fuse
Expert:  airheatman replied 1 year ago.

Ok is there anything in the circuit between board and receiver? If not we should have 24v between R and C at receiver terminals

Customer: replied 1 year ago.
R goes to receiver, # ***** spot,c goes out , presumably to old thermostT, comes back white to Y terminal, jumped to yellow which goes to receiver# ***** Y1 spot
Expert:  airheatman replied 1 year ago.

I am showing the receiver to get 24v directly from furnace board. I am going to open this to other experts who may be more familiar with what you have.

Customer: replied 1 year ago.
I am seeing 22 v on terminals 3 and 5 if the receiver, should I swap these to C and R to rule our damage to old thermostat wires?
Expert:  airheatman replied 1 year ago.

Not sure about the 3 and 5.I do not show numbers, Did it work like this before?

Customer: replied 1 year ago.
For. 6 years
Expert:  airheatman replied 1 year ago.

I don't think I would change them. Just need to follow the wires and see how they have this wired.I have never seen one where they left old thermostat in circuit

Customer: replied 1 year ago.
Please let me know, I will be ok tonight, nasty weather rolling in soon
Customer: replied 1 year ago.
Can we follow up tomorrow?
Expert:  airheatman replied 1 year ago.

I have opened up to other experts who may have more ideas.If I am online wen you come back we will try to figure out what they have

Customer: replied 1 year ago.
Any more thoughts?
Customer: replied 1 year ago.
Not heard from anyone else yet
Expert:  airheatman replied 1 year ago.

Are you able to follow that C wire from furnace and see where it goes?

Customer: replied 1 year ago.
Goes out and up, guess to a failed attempt for a thermostat install, company was really bad
Expert:  airheatman replied 1 year ago.

I think at this point since it appears they have it wired through a component rather than directly to receiver you may be better to call in an onsite tech. My first thought is to tell you to run a R and C directly from furnace to receiver, but am hesitant to tell you that not knowing what else they have wired in.

Customer: replied 1 year ago.
Actually traced it out to evaporator outside, any thoughts?
Expert:  airheatman replied 1 year ago.

WE need it to also go to receiver, but cant understand why it worked before like it is

Customer: replied 1 year ago.
Outdoors?
Expert:  airheatman replied 1 year ago.

Furnace should supply 24v to receiver from R and C

Customer: replied 1 year ago.
Where to on receiver?
Expert:  airheatman replied 1 year ago.

R to R and C to C

Customer: replied 1 year ago.
Receiver, nothing to c, output if r goes to y on board, and y on receiver
Expert:  airheatman replied 1 year ago.

I really am not sure from here.I can request a refund if you would like since no one else has any ideas either.

Customer: replied 1 year ago.
Please refund