HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Heating/AC no Longer Works After Pilot Relit Buy Gas Co My…

Customer Question
Heating/AC no Longer Works After...
Heating/AC no Longer Works After Pilot Relit Buy Gas CoMy gas company replaced my gas meter. After doing so they went into my attic to relight my pilot lights on my two furnaces. After doing this only one of my two units worked. The other does not. I could really use some help getting it going again. The AC and heat worked great one this unit before the guy went up to relit the pilot light.The unit that doesn't work has these items:Honeywell RTH8500D Thermostat
Rheem Criterion Furnace RGVG-05EAUER
Goodman CHPF1824A6 Evaporator CoilThe thermostat looks like it is working correctly. When it calls for heat or AC the unit doesn't turn on.I have checked the breaker for the unit, the power switch by the unit. Both are turned on. The furnace has safety switches on the doors. I have removed to doors and installed them again making sure the switches are pushed in by the covers.
I looked for fuse but didn’t see one.
There is no condensate drain switch.
I have power at the electrical box entering the unit but no green LEDs are lit on the control board when I manually hold in the safety switch over the door.
Any ideas how I can get it going again would be really appreciated.Thanks.
Steve
Submitted: 6 months ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 14 minutes by:
11/22/2017
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 24,206
Experience: 40+ yrs. experience as a licensed oil & gas technician.
Verified

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can

continue our conversation.

This unit deosn't have LED's on the control board. Do you have a multi meter?

Ask Your Own HVAC Question
Customer reply replied 6 months ago
This unit has green LEDs on the board for power,....Yes I have a multimeter. Last night I brought off the wire which connects the unit to the sharp probe. I have striped back a bit of the wire and think it is usable.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

Then the board has been changed. I'm not aware of any boards with LED's that are compatible with a standing pilot (lit all the time) system. Check for 120 volts to the trans foremr primary side and 24 volts on transformer secondary.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Can you see the pictures attached to another question? This is the same unit I worked with JustAnswer on earlier on March 7, 2016..On March 13, 2016 I posted two pictures of the control board/unit. These may help you solve this issue.My unit doesn't have a pilot light.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

You started out by saying "Pilot relit by gas co". If the LED's aren't lit you have no power to the board. You still need to test the transforemer.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
0 VAC on the primary side of the transformer
0 VAC on the secondary side of the transformerBoth measurements were taken with the power switch turned on and the door switch annually held in.Everything is acting like it is a blown fuse but I can't find a fuse anywhere.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

The schematic shows a fuse in the line where the 120 volt feed connects to the unit.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Is it on the board or in the wiring between the house and the board?
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

Looks like it's in the juction box where electrical feed connects to the unit

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I will turn off the power, open the junction box and look in there for a fuse.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

ok

Ask Your Own HVAC Question
Customer reply replied 6 months ago
No fuse in the fuse box. Where else can we look for one?
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

follow that 120 volt line to the board. If there is one it would be between the board and the j box. Do you have 120 vac at the j box?

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I have 120 VAC at the junction box.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

Then you need to trace out where you lose it between the j box and the transformer.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I have 120 VAC at the board.Is the board bad?
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

If you don't have 120 volts at the transformer and 120 volts at the board then the board must be bad since the 120 volt feed to the transformer comes from the terminals on the board. Did you probe those terminals?

Ask Your Own HVAC Question
Customer reply replied 6 months ago
If so how can I find out which boards fit my unit?
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago
Ask Your Own HVAC Question
Customer reply replied 6 months ago
For the transformer I connected alligator clips to the transformer terminals, not the other end of the wires on the board.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

Try probing the terminals where the transformer leads connect to the board. If you have 0 vac get a new board. If you read 120 VAC then you may have a bad connection.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
ouchthat is pretty expensive. Do you know where I can get it for less money?
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

That site as cheap as you're likely to find

I'd appreciate a favorable rating

Ask Your Own HVAC Question
Customer reply replied 6 months ago
What is the correct part number of the replacement I need? My furnace is Model # RGVG-05EAUER. The Serial # is CM1D302F51922356. However my board has been replaced and a flame sensor has been added. I want to ge sure to order the right part.
HVAC Technician: Rick, HVAC Supervisor replied 6 months ago

There's no way I can know what board was used if you have a flame sensor retrofit. Like I said before contact the guys at the the link above for a suitable replacement.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Hi there.I put the replacement board in my furnace. This is the board I got:https://www.amazon.com/gp/product/B00E3EM40S/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1I get no LED lights on the board with the power turned on and the door cover switch pressed.I can’t tell if the problem was misdiagnosed, I got the wrong board, or I installed it incorrectly.What should I do next?Steve
HVAC Technician: airheatman, HVAC Technician replied 6 months ago
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,077
Experience: Furnace, A/C and heat pump specialist.
Verified

Steve let me do a little investigating on this.

Ask Your Own HVAC Question
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Hang on I see you already provided serial.Be right back

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I should have added the model number on my old board is 1012-920A.
Customer reply replied 6 months ago
I have 120 VAC between PR1 and neutral on the board with the door switch closed.
Customer reply replied 6 months ago
I have 120 vac between XFMR and Neutral. They are not wired backwards.
Customer reply replied 6 months ago
0 VAC between SEC and COM XFMR from transformer. Is the transformer shot? If so where can I order the correct part?
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Yes if power in but not out of transformer the transformer is dead, You can buy for about 10 to 15 bucks at any appliance parts store. Just ask for a 120/24 40VA transformer.

Ask Your Own HVAC Question
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

You can get a universal online

https://www.alliedelec.com/white-rodgers-90-t40f3/70101872/?mkwid=s6vGhZJkd&pcrid=30980760979&gclid=EAIaIQobChMIqtSs89X41wIVnrbACh2t2gzkEAQYAyABEgLnFvD_BwE

If you have further questions, please let me know.
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.
To rate answer, please select one of the stars on the page.
Leaving a poor service rating will not automatically refund your money,but reflects poorly on your expert. You have to request a refund if not satisfied with the information provided being accurate.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I should have mentioned it operates in a very high heat and humidity area if that makes any difference to your recommendation for a model.
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

A standard transformer should be fine.The furnace board and other components would be much more susceptable to damage from humidity than the transformer

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Does this one look like it will work good?https://www.amazon.com/White-Rodgers-90-T40F3-Aftermarket-Replacement/dp/B00SXIPZH4/ref=cm_cr_arp_d_product_top?ie=UTF8
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Absolutely .It will come with instructions as to what wires are used for 120 v. Usually black and white

Ask Your Own HVAC Question
Customer reply replied 6 months ago
It has been ordered. I will provide an update after it gets here and I try to put it in.Thanks for working through this!
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Sounds good

Ask Your Own HVAC Question
Customer reply replied 6 months ago
the transformer came last night and I have good news and not so good news.I just installed it and I now have power on the board some green LEDs are on. This is a big improvement.But when I turn on either the heat or the AC nothing turns on either on the furnace or outside.Is the issue the original one, is it the replacement board I put in (I still have the old board and can try putting it in), is it related to the board replacement I did, or is it something else?
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Jumper R and W on control board and see if heat come son (door switch in)https://i.imgur.com/JprQdYv.png

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Okay went to try to jump R & W and no lights on the board now.I have power at the transformer primary and secondary.It tried jumping R & W but nothing happened.Have a good board if you decide we need to use it.
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Let's try the other board.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I should have said I have the old board. I can't say for sure it is good. It will be a while before I can do that.
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

OK, WE should get lights on board if we have power both high and low.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Okay I put the original board in. We have green lights on the board. When I set it to heat the furnace will come on now and I get heat.When I set it to cool the unit outside and attic both don't turn on.95% of what I use the unit for is cooling. How can I get the cooling working again?
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Leave it alone while you have heat. LOL. Just kidding. Lets go to thermostat and see if it could be the problem.Give me model on stat and tell me about the wiring

Ask Your Own HVAC Question
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

I see it in original comment. Go to the setup menu and make sure function 0170 is set to 1

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Here you can see a lot of info and pictures of the AC unit, the thermostat and the veristar add a wire I worked with Billy to get working correctly.https://my-secure.justanswer.com/question/index/e6f4ad32b48140d2af03bc208feef097?continueTheConversation=False&comingFromAdservEmail=False&ratedThroughEmail=False&rating=0&paymentType=Unknown
Customer reply replied 6 months ago
On the thermostat in the setup menu item 170 is set to 1.
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Go to thermostat and connect r to Y and G and see if fan inside and the ac come on

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Nothing when I did that.
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

I am about to leave out of town for weekend.

Are all the wires still like they were when you and Billy talked?

Ask Your Own HVAC Question
Customer reply replied 6 months ago
all the wires are the same as when Billy & I talked.
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

Has to be something breaking the low voltage circuit circuit in cool mode. I am leaving so it will be first of week before I can continue

Ask Your Own HVAC Question
Customer reply replied 6 months ago
I am headed into a weekend when I can totally focus on this. Is there someone else you can have step in for the weekend?
HVAC Technician: airheatman, HVAC Technician replied 6 months ago

I will opt out so other experts may pick up here.

Ask Your Own HVAC Question
Customer reply replied 6 months ago
Thanks airheatman. It is important for me to get this running soon.
Customer reply replied 6 months ago
Can anyone help with this? I able to focus on only this for today and tomorrow.Thanks.
Customer reply replied 6 months ago
airheatman are you back?
Customer reply replied 6 months ago
It has been 4 days since I have heard from a technician.
Customer reply replied 6 months ago
Can someone help solve this problem?
Customer reply replied 5 months ago
Can someone help solve this problem?
Customer reply replied 5 months ago
Could sure use some help with this problem. Can anyone help out?
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a hvac technicianLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask airheatman Your Own Question
airheatman
airheatman
airheatman, HVAC Technician
Category: HVAC
Satisfied Customers: 9,077
9,077 Satisfied Customers
Experience: Furnace, A/C and heat pump specialist.

airheatman is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future.

JimmyBagley, IA

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

< Previous | Next >

Meet the Experts:

Phil

Phil

Mechanical Engineer

6,938 satisfied customers

Retired HVAC/ Electrical & Boiler contractor. Industrial

Rick Mather

Rick Mather

HVAC Technician

3,133 satisfied customers

35 years experience, HVAC

Matthew

Matthew

HVAC Technician

2,014 satisfied customers

14 years experience in the HVAC field of service, installation, Manual J & D calculations

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

953 satisfied customers

I have been an HVAC/R mechanic/technician for 30+ years.

Rick Ridley

Rick Ridley

UK Heating Engineer

871 satisfied customers

Retired But have had 30 years on the tools, Ex CORGI

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

< Previous | Next >

Related HVAC Questions
green light blinking 3 times on international comforft products
green light blinking 3 times on international comforft products model EBU2X42LA1… read more
airheatman
airheatman
HVAC Technician
9,077 satisfied customers
Why timer light of Hitachi split type AC keeps flashing?
I have a Hitachi split type air conditioner model # RAS-25CHAR/RAC-25CHA which has the timer light flashing 13 times , then stops for 5 seconds , then repeats. The unit will not switch on , I have tur… read more
drcool299
drcool299
shop owner
Bachelor\u0027s Degree
22 satisfied customers
Commercial refrigeration compressor freezing up.....what is
Commercial refrigeration compressor freezing up.....what is the problem… read more
HVAC_Doug
HVAC_Doug
Vocational, Technical or Trade Scho
On my Trane evaporator/air handler/furnace unit, the fan
On my Trane evaporator/air handler/furnace unit, the fan will not come on, though thethermostat/control panel in the thehouse … read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
6,938 satisfied customers
I am replacing a evaporator on a refrigerator and I have a
I am replacing a evaporator on a refrigerator and I have a FB12 flame barrier. It has two sides and aluminum and fiberglass. There's a little sticker on the aluminum side saying do not use the side to… read more
airheatman
airheatman
HVAC Technician
9,077 satisfied customers
My upstairs HVAC has the evaporator located in the attic.
My upstairs HVAC has the evaporator located in the attic. There are two drain lines running inside the wall to ground, one on the evaporator and one on the drip pan under the evaporator, the drip pan … read more
Iohn Keffer
Iohn Keffer
HVAC Tech
Associate Degree
66 satisfied customers
What would make evaporator fan motor stop and the unit to
what would make evaporator fan motor stop and the unit to freeze up … read more
airheatman
airheatman
HVAC Technician
9,077 satisfied customers
Evaporator coil has a leak. Its a Lennox coil part number
question is Lennox coils have had issues with Leaks coil is about 6 years old i was wondering if another brand coil… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I need the BTU rating for a Heatcraft Evaporator Model
I need the BTU rating for a Heatcraft Evaporator Model ADT56AWGJ … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Today, evaporator coil froze over and i heard the outside
Today, evaporator coil froze over and i heard the outside condensor area making a louder noise. i shut the ac off when noticing this and the coil melted and the fan blows air now. i looked at the evap… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,870 satisfied customers
How much does an evaporator coil cost for Ruud Model
how much does an evaporator coil cost for Ruud Model UBHA-17J11SFGA cost? … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I replaced a jazz bored today along with evaporator fan
I replaced a jazz bored today along with evaporator fan motor and I can only get the motor running if I use the ground wire to one terminal on the motor and one of the wires that has 120 V I replaced … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
Blower runs no heat, limit switch is open per panel code 3
Blower runs no heat, limit switch is open per panel code 3 blinks rolled by a 2 sec pause. Unit is a Rudd achiever 90 model RCBA. Any idea if this unit has a reset? Can not locate any. Thanks… read more
V12Tech
V12Tech
252 satisfied customers
Error lights on Lennox Harmony III Zone Control System
I have a Lennox Harmony III Zone Control System, controlling A/C distribution between the 1st floor and 2nd floor. Today we noticed the upstairs was too warm and the air flow seemed very slow. I looke… read more
Rick Mather
Rick Mather
HVAC Technician
Vocational, Technical or Trade Scho
3,133 satisfied customers
What should the high and low side pressures read on a R-22 system
What should the high and low side pressures read on a R-22 system at 90 degrees outside temperature? Already Tried: EPA certified, added some refrigerant. High side reads about 250 give or take at 90 … read more
Bart Jay
Bart Jay
Vocational, Technical or Trade Scho
596 satisfied customers
Round Heat Pump Outside making a beeping noise every two or three minutes
Early this morning I began to hear a beeping noise coming from somewhere in the house. I have now traced it to the heat unit out back behind the house. It is making a beeping noise like there is some … read more
coolman1973
coolman1973
AC/Heat Tech
Vocational, Technical or Trade Scho
162 satisfied customers
my kelvinator air conditioner is leaking i think from the bottom
my kelvinator air conditioner is leaking i think from the bottom right hand side… read more
drcool299
drcool299
shop owner
Bachelor\u0027s Degree
22 satisfied customers
what does a lot of bubbles in the sight glass mean in a hvac
what does a lot of bubbles in the sight glass mean in a hvac air condition uint mean… read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x