Explore answers about Heat Exchanger

My fan will not turn off. The control panel syas it is off

My fan will not turn off. The control panel syas it is off but it keeps going. It is kind of random. Sometimes it will. Sometimes it wont. I have 4 units in my condo. 2 do the same thing the other 2 are fine.JA: Did you double-check the thermostat? And what about the unit's filters?Customer: New filters. All clean. And the termostats are all new and wired correctly. Could it be something else.JA: Do you plan on doing the work yourself?Customer: Id like to try and understand what it wrong and then see how complex it is to fox.JA: Anything else we should know to help you best?Customer: fix

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Rick

Supervisor

27,320 satisfied customers
Xl225-3.replaced valve, thermocouple, new

Xl225-3.replaced valve, thermocouple, new regulator.established 1/2 pound pressure to heater.new eco switch.Heater lites ,nice blue flames, runs fine about 30-45sec.pilot&fire both go out.relite pilot turn on valve again works for 25 sec then goes out again.different run time each try.nevsr seen this in 31 years of servicing hvac/r equipment. Please help , thank you, Fred. ?

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Daniel Plourde

plumbing, hvac technichian

Vocational, Technical or Trade School

546 satisfied customers
I'm going to start with I also have 30 years experience This

I'm going to start with I also have 30 years experienceThis is a Hydro therm boiler I've seen this problem before and done many things to correct it I believe it's a flaw in the system the problem, flame rolling outScoring the front to the boiler , ignition firing gas Inside the firing tubes

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Rick

Supervisor

27,320 satisfied customers
My son's furnace keeps popping the flame rollout switch with

My son's Bryant furnace keeps popping the flame rollout switch with a code '13'. He doesn't notice the issue until it goes into a lockout with code '33' which I believe is why the t-stat is going off. Suggestions?

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BillyHvac

Journeyman Service Technician

State Licensed Mechanical Contractor

12,578 satisfied customers
I have a Carrier 58MCA100-16 furnace. When looking into the

I have a Carrier 58MCA100-16 furnace. When looking into the fire box, is the blue flame supposed to be outside of the tubes? The surface on the top of the unit below the A coil is getting very hot. Had a code 33. Replaced blower motor, pushed back in switch on right of burner box. Local heat man is concerned the flame is not limited to tubes. Checked for air blockages nothing.JA: Did you double-check the thermostat's settings? And what about the filters?Customer: Filters just changed. Settings fine.JA: Do you plan on doing the work yourself?Customer: No they changed blower motor yesterday evening. They are trying to tell me need new furnace because of the way the burner isJA: Anything else we should know to help you best?Customer: Don't think

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gotoman for ac

HVAC Service manager and owner

Associate Degree

5,514 satisfied customers
I have a Honeywell CT8602 thermostat (only using 2 wires red

I have a Honeywell CT8602 thermostat (only using 2 wires red & white) that I purchased back in early to mid 2000's for my home and I suspect it's failing and would like your opinion. The furnace is a an old school Payne Model 394GAW gas, forced-air, furnace with electronic ignition installed in 1987 in my heated daylight basement and has ran flawlessly all these years with exception of gas controller replaced when it was only 2 years old and blower motor replaced in 2007 (I'm same owner since it was installed). Last maintenance & inspection of heat exchanger was 2014 and it still looked solid. A week a go, I noticed when the furnace was commanded to run, the electronic ignitor would spark followed by the pilot lighting. A little over a minute later the main burners would fire up for a few seconds, but then go out. It would do this between 2 - 4 times each run cycle. Just before the blower would kick on, the main burners would stay lit for the remaining cycle and the house would heat to the programmed temperature. After researching troubleshooting ideas on line, I bypassed the thermostat by connecting the red & white wire together and the furnace and burners operated flawlessly with no cycling of the main burners. I did this 5 times in a row including waiting an hour to cool the furnace down completely and every test worked fine, thus I believe it's the thermostat. I know there are plenty of other tests that can be done to the furnace components including testing the circuit board, but I'd like to know if you feel I'm on the right path of assuming it's the thermostat. I also noticed the thermostat cannot be put into 'Smart Response' mode which also leads me to believe it's failing. Your thoughts?

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Rick

Supervisor

27,320 satisfied customers
New thermal protection device installed in Trane XE90. It is

New thermal protection device installed in Trane XE90. It is correct for model. Gas Furnace turns on, ignitor gets red, Flames ignite, Fan comes on, all indicators are normal. Flames go out, four flashes indicating Thermal Pro Device OPEN. Turn off unit, Restart, everything goes normal and then same problem with "Open Device" indicated

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Rick

Supervisor

27,320 satisfied customers
How much does your answer / opinion / help cost? Sorry, I

Hi Tim - How much does your answer / opinion / help cost?JA: I'm not sure of the exact price, but there's only a $5 deposit. The rest of the price information will be on the page I send you to.Customer: Sorry, I mean , PearlJA: I'll do all I can to help. How long have you been dealing with this?Customer: Sorry - just want to better understand payment for your advice - page you send to me ?JA: Do you plan on doing the work yourself?Customer: noJA: Anything else we should know to help you best?Customer: you're not answering my question about payment for your chat advice.... how does this work>?

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Phil

Consultant to Engrs, Govt & Contractors

Degree, Mech Engr Technology

10,768 satisfied customers
I have a amana air command 95 furnace, i have 4 blinking red

I have a amana air command 95 furnace, i have 4 blinking red lights, both blowers are running, but no heat or flame, code says open high limit switch, problem is i not sure where it is, need helpJA: Did you double-check the thermostat's settings? And what about the filters?Customer: Yes, checked bothJA: Do you plan on doing the work yourself?Customer: YesJA: Anything else we should know to help you best?Customer: Not really, i just cant find any resets

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Rick

Supervisor

27,320 satisfied customers
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