HVAC

Have HVAC questions? Ask an HVAC Expert for answers

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

Related HVAC Questions
Lennox furnace is showing ‘system is waiting' on thermostat.
Lennox furnace is showing ‘system is waiting' on thermostat. HVAC Company was called and came out earlier today (this was after I ‘reset' the furnace via the circuit breaker and everything was working… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
8,427 satisfied customers
The only way I can get my Lennox PULSE 21 to give up heat is
The only way I can get my Lennox PULSE 21 to give up heat is to push the fan on button on my thermostat. Otherwise all I get is the 8 second or longer trial for ignition and then nothing. The 21 follo… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,361 satisfied customers
My furnace is not working correctly. I have fixed several
My furnace is not working correctly. I have fixed several items on it before, but none are working. The main blower motor comes on a few seconds after turned on and the flame sensor light is blinking … read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,970 satisfied customers
have a lennox el296uhv with a flashihg red light it flashes
have a lennox el296uhv with a flashihg red light it flashes 4 times and pauses.air filter was very dirty...have changed with proper air filter but light still flashing 4 times then a pause....is somet… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,970 satisfied customers
Inducer motor runs, HSI glows for several seconds, then no
Inducer motor runs, HSI glows for several seconds, then no gas (gas valve doesn't open). Pressure and switch checkout, roll out switches check out for continuity. Already replaced the control board. I… read more
Theplumber717
Theplumber717
Plumber
Vocational, Technical or Trade Scho
1,265 satisfied customers
problem: the unit fan blower comes on when starting, then the
problem: the unit fan blower comes on when starting, then the vent motor come on after the fan stop, but the pressure switch do not engage and the burners don't come on, will you help me.… read more
Phil
Phil
Mechanical Engineer
Degree, Mech Engr Technology
8,427 satisfied customers
WE have a lennox Elite series model number G2603 75 4. the
WE have a lennox Elite series model number G2603 75 4. the inducer motor seems to come on for bout 1 to 2 seconds and then it turns off and then will not come on until you turn the power off and then … read more
Rick
Rick
HVAC Supervisor
28,577 satisfied customers
I have a Gibson KG6RC080C-16B furnace that is not heating... It
I have a Gibson KG6RC080C-16B furnace that is not heating... It uses Nordyne 624631-a control board and a 904081 gas valve. I am getting a constant flash from the red led on the control board. After r… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,970 satisfied customers
We have a Lennox Elite model CX34-62C-6F-1. It has not been
We have a Lennox Elite model CX34-62C-6F-1. It has not been cooling well the last couple of days and last night it started to only run for 15 seconds or so. It comes on w/ cool air, then cuts off afte… read more
hvacdave84
hvacdave84
Lead Service Technician
Vocational, Technical or Trade School
117 satisfied customers
Could somebody help with RUUD Gas/Electric package rooftop
Could somebody help with RUUD Gas/Electric package rooftop unit? The 4 units SKNL-B150NL21 with the same symptom: - Thermostat calls for heat - One Inducer starts purge - After 30 seconds igniter come… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,970 satisfied customers
My Lennox Pulse 21 G21Q3-80-1 occasionally would lock out.
My Lennox Pulse 21 G21Q3-80-1 occasionally would lock out. Power off/on cycle reset it. Lately it locks out at the end of the cycle more often than not. Power cycle resets it. I've watched it through … read more
hvacexpertjoe
hvacexpertjoe
Electronics Technician
Vocational, Technical or Trade Scho
186 satisfied customers
i need a detailed step by step sequence of operation of 80+
i need a detailed step by step sequence of operation of 80+ and 90+ furnace i need voltages pre-purge and post purge details i really need step by step details also i need a trouble shooting ladder di… read more
airheatman
airheatman
Heating & Air Conditioning Contractor
6 years college
9,970 satisfied customers
Billy, you helped me last year with an AC problem...I have
Billy, you helped me last year with an AC problem...I have a new one for you. Lennox G51MP with 97L48 SureLight Control AC does not stay running, here is the detail. 1. T-stat demands cool 2. Outside … read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,361 satisfied customers
I have a Lennox G2603-75-3 that the blower is running constantly
I have a Lennox G2603-75-3 that the blower is running constantly but will not ignite. The Diag lights show that the Primary/ Secondary Limit Switch is open. How do I find the limit switch so I can res… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,361 satisfied customers
Good Morning Lennox Model FTB08 indoor Blower for my 13ACD
Good Morning: Lennox Model FTB08 indoor Blower for my 13ACD Air Conditioner. When the thermostat call for Cooling I hear a Click and the Outdoor unit, (13ACD) comes on Normally. But the inside blower … read more
Douglas
Douglas
Vocational, Technical or Trade Scho
3,118 satisfied customers
I have a Lennox model # G24m3/4-100A-2 gas heater. It is installed
I have a Lennox model # XXXXX gas heater. It is installed in the attic. Fan only blows cold air when set to on and heat. When set to auto and heat, the heater never comes on. The thermostat makes a si… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
5,423 satisfied customers
Lennox forced air gas furnace model#g14q3-100-6 Serial #5888H03001 Furnace
Lennox forced air gas furnace model#g14q3-100-6 Serial #5888H03001 Furnace does not ignite when thermostat calls for heat. The thermostat was changed a year ago when the same problem occured. If conta… read more
BillyHvac
BillyHvac
Journeyman Service Technician
State Licensed Mechanical Contractor
14,361 satisfied customers
I have a lennox 80MGF with a upgraded ECG-1 board that was
I have a lennox 80MGF with a upgraded ECG-1 board that was replaced 9 years ago. Never had any problems with unit. Ok now the sequence. Blower works fine, house had gas and gas line is ok as hot water… read more
DanielC
DanielC
Service manager
High School or GED
95 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