HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Ask an Expert,
Get an Answer ASAP!

Related HVAC Questions
My HVAC system stopped working yesterday. Here are the
Hi! My HVAC system stopped working yesterday. Here are the components: White Rodgers Thermostat 1F81-51 White Rodgers Control Module 50A51-495 Trane XL 80 The screen on the thermostat went blank. I to… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
I have an American Std UY120R9V5V . The zone controller is
I have an American Std UY120R9V5V . The zone controller is calling for heat, but there is no ignition or blower activity. The vent fan runs continuously which is not normal. It was running fine yester… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
I have a Trane XB80 gas furnace / air conditioner that will
I have a Trane XB80 gas furnace / air conditioner that will not light sometimes. It has a White Rodgers circuit board 50A55-571 with a blinking red light. Usually, when I turn off the thermostat for a… read more
Theplumber717
Theplumber717
Plumber
Vocational, Technical or Trade Scho
1,264 satisfied customers
Hello Mr. HVAC Technician, We have a GHR26 Lennox Elite Series,
Hello Mr. HVAC Technician, We have a GHR26 Lennox Elite Series, Model CHR26Q3-75-8. The 2 lights are blinking normally. When I remove the door panels and depress the door sensor switch, the only thing… read more
Brian HVAC Guy
Brian HVAC Guy
HVAC Technician
High School
1,024 satisfied customers
Hello, Last month I had a new Trane HVAC system installed
Hello, Last month I had a new Trane HVAC system installed at my home. This was a complete replacement of the AC, coil, and furnace. The furnace is a down draft XR95, the AC is an EXR 16. The AC works … read more
R.G.
R.G.
318 satisfied customers
I HAVE A LENNOX 80UHG FURNACE. IT WILL NOT COME ON AT ALL.
I HAVE A LENNOX 80UHG FURNACE. IT WILL NOT COME ON AT ALL. CODE LIGHTS BLINK AT THE SAME TIME SLOW. WHEN THERE IS A DEMAND FOR HEAT THE LIGHTS BLINK FAST AT THE SAME TIME. AFTER A FEW MIN. THE LEFT LI… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
7,807 satisfied customers
I have a question concerning a goodman furnace - GMS80905CNBD. The
I have a question concerning a goodman furnace - GMS80905CNBD. The draft blower comes on but no gas flows. Looking at the pressure switch, the voltage at the terminals is 1.16 volts when the blower is… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
7,807 satisfied customers
My P474-1100RF theromstat isnt communicating with the receiver.
My P474-1100RF theromstat isnt communicating with the receiver. Unlike my first P474 that died, the thermostat looks ok and the buttons work, but it doesnt control the HVAC unit. During the winter, I … read more
Douglas
Douglas
Vocational, Technical or Trade Scho
3,087 satisfied customers
What is the reason for red blinking light inside the furnace?
What does the red blinking light mean inside the furnace? Can be seen from the small peep hole on lower furnace panel? There was a gas outage in our area. Gas service has been restored and furnace see… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
The furnace is working but I can see a flashing red light and
The furnace is working but I can see a flashing red light and a steady green light through the small window in the front of the furnace. What does the flashing red light mean?… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
So Ive installed a new thermostat and am running throught
So I've installed a new thermostat and am running throught the test in the instruction. Said to crank the heat up to 90 and wait two minutes. Did, but cool air is blowing out. Looking through peephole… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
I have a Payne PG9MAB furnace. I smell an electrical burning
I have a Payne PG9MAB furnace. I smell an 'electrical burning' smell which prompted me to check the furnace. I removed the front panel and see the red LED status light is solid red - should it be soli… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
have a gks9, red light is on (not blinking), furnace doesnt
have a gks9, red light is on (not blinking), furnace doesn't start . The thermostat is an honeywell (3 wires), fan is working when if force the fan on, .... fast answer is appreciated ... It's pretty … read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a Lennox 80MGF 4/5-120A-1 furnace. Same symptoms as
I have a Lennox 80MGF 4/5-120A-1 furnace. Same symptoms as asked back 300 days ago by a different customer. Just need a little help with diagnosis. I'm able to troubleshoot with you. I have a Lennox M… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
Fan runs, orange glow, relay clicks but no gas ignition, red
Fan runs, orange glow, relay clicks but no gas ignition, red led is blinking, is the problem the ignitor or gas valve? Model of unit is Trane X880. Resistance of ignitor is around 34 ohms.… read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
I have a trane xr90 and a honeywell minizone. No heat, but
I have a trane xr90 and a honeywell minizone. No heat, but the fan runs. Minizone shows no calls for heat, though all zones' thermostats are set high enough to call for heat. Furnace blinks steady red… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 satisfied customers
Have a RUUD Super Quiet 80 Two-Stage. Presently operating
Have a RUUD Super Quiet 80 Two-Stage. Presently operating on heat cycle. When looking through blower compartment window, I see the 4 LED's lit up in this order from left to right: yellow/steady - gree… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
one the bottom half of our furnace (a Trane high efficiency
one the bottom half of our furnace (a Trane high efficiency two stage XL80) there is a clear circle.....there is now a constant blinking red light here in this circle. what does this mean? we recently… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
13,887 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.

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

7,634 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

Brian HVAC Guy

Brian HVAC Guy

HVAC Technician

1,024 satisfied customers

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

Kenton Guidry

Kenton Guidry

HVAC Technician

963 satisfied customers

12 years install/service experience.

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 >

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