HVAC

Have HVAC Questions? Ask an HVAC Expert for Answers

Ask an Expert,
Get an Answer ASAP!

HVAC

I HAVE A LENNOX G26Q3/4-100-3 I have a problem when it is in

Customer Question
heat mode of not always...
i HAVE A LENNOX G26Q3/4-100-3 I have a problem when it is in heat mode of not always kicking on when the thermostat tells it to, but do not have this problem when it is cooling.
JA: Did you double-check the thermostat's settings? And what about the filters?
Customer: new filter about a month ago and the thermostat check out fine I can even here the click on the thermostat to tell it to kick on and sometimes it does and sometimes it does not if it does not i go to the basement and kill power to it for a couple of minutes and it starts working fine again I have had people come and check this ,but it never does it when they are looking at it.
JA: Do you plan on doing the work yourself?
Customer: depending on what I can narrow the problem to I was almost thinking it could be a solenoid problem
JA: Anything else we should know to help you best?
Customer: no I think that is it
Submitted: 1 year ago.Category: HVAC
Show More
Show Less
Ask Your Own HVAC Question
Answered in 1 minute by:
11/14/2016
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago
Rick
Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 22,349
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. First I’ll need some more info so I have a more complete picture of you situation.

When it doesn't fire up does the furnace respond at all or does nothing happen?

Ask Your Own HVAC Question
Customer reply replied 1 year ago
it works fine unless it decides not to turn on when the thermostat tells it to
Customer reply replied 1 year ago
i am not at home at the moment so a call would do no good
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

That doesn't exactly answer my question. It sounds like you're saying when it doesn't work you have a call for heat but the furnace doesn't respond, nothng happens. If that's the case then the most likely culprit is a problem with the thermostat or the thermostat wiring between the stat and the furnace. A partial break in the wiring or a failing thermostat can cause this

Ask Your Own HVAC Question
Customer reply replied 1 year ago
the thermostat calls for it to turn on and sometimes it does not fire if I reset power to the furnace then it fires and will continue to fire several times when called by the thermostat and randomly one time it will decide not to fire.
Customer reply replied 1 year ago
I had a tech that checked the thermostat and wiring before and said it checked out fine
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

So the furnace responds to a call for heat but just doesn't fire up intermittently? If so you can you tell me what the LED sequence is on the board is when it doesn't fire?

Ask Your Own HVAC Question
Customer reply replied 1 year ago
there is no error on the furnace when it does not fire it just does not do anything and I know it was called because I can hear the click at the thermostat
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Then you still could have a wiring problem between the stat and the furnace. Did the tech check it out when it wasn't working? If not then his aseertion that's it's all OK is meaningless. That's the nature of intermittent problems and 18 gauge wire is notorious for breaking partially, un-noticed. The other possibilities are much more expensive to fix and harder to trackdown. You could have a bad connection in the control board or possibly a problem with the draft inducer fan (also a bad connection possible). If the inducer doesn't run then nothing else will happen.

Ask Your Own HVAC Question
Customer reply replied 1 year ago
The draft inducer fan would that possibly start and shutdown quickly because sometimes when I reset power a fan will kick in and shut down almost immediately then a few moments later kick back on and everything is fine.
Customer reply replied 1 year ago
Also why would this not be a problem when it is cooling if it were to be a thermostat wire
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Cooling is an entirely different circuit and runs off different leads in the thermostat cable. The fan behavior you descibe doesn't eliminate any of the possibilities.

Ask Your Own HVAC Question
HVAC Technician: Rick, HVAC Supervisor replied 1 year ago

Do you have any more questions?

Ask Your Own HVAC Question
Ask Phil Your Own Question
Phil
Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6,022
6,022 Satisfied Customers
Experience: Retired HVAC/ Electrical & Boiler contractor. Industrial

Phil 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

6,022 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
I have central AC sysyem - Spacepak airhandler, York
I have central AC sysyem - Spacepak airhandler, York affinity 3s outside unit and a Honeywell TH8100U1003 thermostat. The outdoor unit has been intermittently cooling but seemed to start working again… read more
Phil
Phil
Mechanical Engineer
6,022 satisfied customers
My unit is not operating correctly. I have it set at a temp,
my unit is not operating correctly. I have it set at a temp, and it doesn't come on when the temp goes below the set heating temp. I have to manually hit the set button and it comes on, but then it do… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a Weil-McLain CGa boiler. The pilot is lit and it
I have a Weil-McLain CGa boiler. The pilot is lit and it sounds like it is switching on and off (when the thermostat is on) but we're getting no heat. Is there something I should be checking? Thanks. … read more
Rick
Rick
HVAC Supervisor
22,349 satisfied customers
Looking for replacement blower motor for an old RUUD gas
Looking for replacement blower motor for an old RUUD gas furnace model HN-175JD blower # RL10-9DUH … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
My Trane TUE080A936K2 furnace isn't heating the ignitor
my Trane TUE080A936K2 furnace isn't heating the ignitor never glows, but the fan spins up … read more
Billy
Billy
Journeyman Service Technician
State Licensed Mechanical Contractor
9,330 satisfied customers
I have a York central heat unit. The problem is it wants to
I have a York central heat unit. The problem is it wants to turn on to give heat but shuts off after about 2 seconds and keeps on doing the same thing. Had this problem 3 weeks ago. Unplugged limit sw… read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,082 satisfied customers
Just inherited my grandparents house. Built in 1972. They
Just inherited my grandparents house. Built in 1972. They have a closet that is 50 by 70 inches that used to house a gas water heater and a gas furnace, below the closet is the intake air. The gas fur… read more
Rick
Rick
HVAC Supervisor
22,349 satisfied customers
I have the same problem with my code 33 I followed your
I have the same problem with my Bryant code 33 I followed your instructions as described here and it worked so I need a new limit switch, with one caveat, I let the wires touch metal and now I get not… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
90% secondary heatexchanger holding a lot of water in it,
Bryant 90% secondary heatexchanger holding a lot of water in it, not allowing the pressure switch to close. I removed the 3 hoses at the top (2 large 1 small) of the plastic trap and drained the water… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
How are you? I have a Breckwell P-2700 FSA Pellet stove and
I have a Breckwell P-2700 FSA Pellet stove and when the stove is on the auger continues to feed pellets into the pot. … read more
Jerry
Jerry
Plumber
High School or GED
1,456 satisfied customers
I am replacing a RUUD 3aat86b9a1 with a Honeywell
I am replacing a RUUD 3aat86b9a1 with a Honeywell RTH2510/RTH2410v series. … read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
Associate Degree
4,135 satisfied customers
I have a Trane XE90. When the cover, covering the chamber
I have a Trane XE90. When the cover, covering the chamber containing the gas tubes, igniter, heat sensor, flame sensor rod, etc. is off the system runs perfect. If I put the cover on the system will i… read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
My temperature gage is stuck on Hold 67. How do I clear the
how do I clear the program so I can regulate the temp… read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 satisfied customers
I want to know if I can on a F 45 Greenville jotul
I want to know if I can cook on a F 45 Greenville jotul woodstove. … read more
Webb-Guy
Webb-Guy
tech.
78 satisfied customers
I have a leak in the water supply pipe right at the
I have a leak in the water supply pipe right at the connection where the pipes are welded together … read more
HVAC Guru
HVAC Guru
Service Technician
Associate Degree
682 satisfied customers
I have a Heat-N- Glo gas fireplace. Fire starts, when I turn
I have a Heat-N- Glo gas fireplace. Fire starts, when I turn switch on, burns for a few minutes, then go out & in a few minutes start burning again … read more
Jerry
Jerry
Plumber
High School or GED
1,456 satisfied customers
I have a M1MC nordyne furnace. The weak flame yellow led
I have a M1MC nordyne furnace. The weak flame yellow led light flashes. Everything seems to operate normally except the air blows cold to lukewarm. I learned that the igniter also serves as the flame … read more
Gaztech
Gaztech
Technician
Vocational, Technical or Trade School
1,082 satisfied customers
Our furnace is no heating. I just changed the filter. It
I just changed the filter. It doesn't seem to be lighting. The red LED is flashing 1 + 3 which indicates "Flame Sense out of sequence". … read more
Airheatman
Airheatman
Heating & Air Conditioning Contractor
6 years college
1,836 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