HVAC

Have HVAC questions? Ask an HVAC Expert for answers

Connect one-on-one with {0} who will answer your question

Related HVAC Questions
I reset the limit switch on my Rheem Criterion gas furnace,
Hello, I reset the limit switch on my Rheem Criterion gas furnace, the ignitor fires and the furnace begins to work, after about 45 seconds the fire appears to roll over and blow back. Would that indi… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
10,288 satisfied customers
I have a 1990 rheem criterion with 3 blinking lights. The
Hi, i have a 1990 rheem criterion with 3 blinking lights. The filter was dirty, i changed it. The ignitor is new, and from reading previous posts, I think the limit switch tripped. I am wondering if y… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,663 satisfied customers
I have a beacon garage furnace. BRU-75K btu. Tried to start
I have a beacon morris garage furnace. BRU-75K btu. Tried to start it for the first time this season and got a pressure limit switch code. Had this last year also, but somewhere along the line of mess… read more
Rick
Rick
HVAC Supervisor
29,388 satisfied customers
My trane xe 80 keeps blowing cold air without igniting.
My trane xe 80 keeps blowing cold air without igniting. Controller blinking 4 times (limit switch code).… read more
Kcrand36
Kcrand36
Technician/Owner
Vocational, Technical or Trade School
72 satisfied customers
I have an amana furnace Model number GUIC090CA30. The furnace
I have an amana furnace Model number GUIC090CA30. The furnace will not ignite when calling for heat. When I put power on the unit the blower fan runs constantly even when the thermostat is not calling… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,418 satisfied customers
I have an American Standard (Trane) Freedom 90 propane gas
I have an American Standard (Trane) Freedom 90 propane gas furnace. The diagnostic error code is flashing 4 times indicating an open high limit switch. The furnace fan come on but the burners don't ig… read more
Theplumber717
Theplumber717
Plumber
Vocational, Technical or Trade Scho
1,265 satisfied customers
I have a white-rodgers universal 50A55-843 with diagnostic
I have a white-rodgers universal 50A55-843 with diagnostic indicator flash code 4 open high temp limit switch flashing....the furnace only blows cold air.. I bypassed the limit switch and the burners … read more
V12Tech
V12Tech
252 satisfied customers
I am getting a 33 code and furnace will not light. I have
I am getting a 33 code and furnace will not light. I have checked voltage at roll-out and limit switches while it is running it's 4 minute test and I get 27 vac at all terminals to ground. If I leave … read more
M Oglesby
M Oglesby
Vocational, Technical or Trade Scho
2,038 satisfied customers
I have a Trane XR80 furnace that has been converted for LP
I have a Trane XR80 furnace that has been converted for LP use. We recently had a power outage, so I don't know if that's contributing/aggravating things, but... I am getting four blinks of the red li… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
my red light is flashing 4 times i belive it is my thermo copling
my red light is flashing 4 times i belive it is my thermo copling it will not close. I can change it myself in the morning but I dont know what the thermo coupling looks like… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
My a 9200 weather maker unit it is blowing cool air not heat.
My a 9200 weather maker unit it is blowing cool air not heat. there is a red light in the unit blinking 3 short blinks and then 3 long blinks… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
I have a Payne furnace for the lower zone of my house. The
I have a Payne furnace for the lower zone of my house. The blower run continuously but there is no ignition, no heat. The LED has 3 slow flashes and 3 fast flashes indicating a limit circuit fault or … read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
hi i have an american standard heater single stage freedom
hi i have an american standard heater single stage freedom 80 and it is sending a trouble light . the light flashes 4 times which through some research i have found that to be a error fault of open hi… read more
Tim H.
Tim H.
Lead building engineer
Vocational, Technical or Trade Scho
3,962 satisfied customers
I have a Bryant furnace showing error code 33. How do I fix it?
I have a Bryant furnace showing error code 33. This indicates that the filter needs to be changed - and it did (badly). Further on it says that the Furnace Rollout Switch and the BVSS require manual r… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
I have a Trane XE90 furnace that blows cold air. Control unit
I have a Trane XE90 furnace that blows cold air. Control unit displays four flashes. Both limit switches seem to be OK showing zero volts in operation and continuity when disconnected. The manual rese… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
xr-80 system red light flashes 4 times. what are the most
xr-80 system red light flashes 4 times. what are the most common causes ?blower comes on but no ignition… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,418 satisfied customers
Tempstar DC90 Model# NCGM100EHA3. Two weeks ago would not ignite;called
Tempstar DC90 Model# XXXXX Two weeks ago would not ignite;called service tech & he installed new fan control board ($270). Christmas morning...same problem. Tech that serviced is on vacation called an… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 satisfied customers
Hello, My Luxaire model LM85100C20UH11B displayed a code 7
Hello, My Luxaire model LM85100C20UH11B displayed a code 7 and 11. I reset the board and now, I can see ignition fan running and the blower running, but no FLAME. Its cold can you help?… read more
Matthew
Matthew
HVAC Technician
Bachelor's Degree
2,014 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

8,427 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

1,029 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.

Tom

Tom

HVAC Technician

770 satisfied customers

16+yrs HVAC/R service. Residential Commerical Industrial

A-1 Tech

A-1 Tech

Service Manager

526 satisfied customers

I have been in the HVAC business for over 40 years.

< 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