Question about Goodman GMS90703BXA Heater

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Heater not staying lit

My heater has an auto light and it is lighting you can see the flame going into the furnace then it stop a few seconds later it starts up again with the same result. The fan is blowing and its lighting up it just wont stay lit and blow heat . any advice

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  • 288 Answers

You have a common problem. You are losing the 24v somewhere. You will need a meter to repair it, as there are many part that could be the problem. Changing parts without knowing can get expensive. If you have a meter and know how to use it, I can help you.

Posted on Feb 19, 2008

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Posted on Jan 02, 2017

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2 Answers

Pilot wont light


Pilot won't light ...

If we are talking about an OLD TIME "open flame"
PILOT...

There is a lighting sequence... Push & hold the button
put a MATCH to the gas and count to 30 (thirty seconds)...

Will USUALLY get the job done...

The HOLDING for 30 seconds... ALLOWS
time for the THERMOCOUPLE to warm...
assuring the flame is active and RAW GAS is
not escaping (important safety feature)...

MOST common cure for FAILURE to stay lit: REPLACE
that THERMOCOUPLE...

Still carried by most hardware stores... it is important
not to OVER-TIGHTEN the new replacement...

Ideally... you should MEASURE THE LENGHT and
make sure you are buying the right length/size...

Amazon example
Honeywell CQ100A1013 24 Inch Replacement Thermocouple for Gas Furnaces...

eBay example
Universal Thermocouple 24 works with Most Gas Furnaces water heaters...

I buy two...
(I have a SPARE IGNITER or Thermocouple for
every oven, water-heater... heater and patio heater
that keeps my wife happy).

Carnac the Magnificent

Nov 18, 2017 | Heating & Cooling

1 Answer

I have a reznor heater in my garage I have to keep lighting the pilot it wont stay lit.


i have an ole reznor in my garage been workiing for ten + years no problems , mine is gas , the pilot light does go out after it switches to main burner like ten seconds later , but does light back up when thermostat shuts main off ( i had to go look to make sure) not a real big flame maybe like an inch or so , has a spoon shaped air shield around it , maybe yoours is missing ?

Mar 02, 2015 | Heating & Cooling

1 Answer

Pilot on furnace wont stay lit


Sounds like the thermocouple is shot

Nov 09, 2014 | Dayton Gas Furnace Heater

2 Answers

Why does pilot light turns on gas burner only to have it go out about 10 seconds later? 30 to 40 sec later repeats,without lighting. What is problem? once in awhile, it will light..not often. The burner...


Hello
Sounds like the thermocouple is going bad.The thermocouple is a thin tube that runs from the pilot lite to the gas valve.
What it does is it sences the heat from the pilot lite and keeps the gas valve open to allow the pilot to stay on.
This can be easily repaird by shutting off power and gas to your heater and removeing the thermocouple from the gas valve,then unclip or unscrew it from the pilot lite area.
Any plumbing supply store or home depot or lowes should have these.

Once you get a new one,install to gas valve and pilot lite area then turn on power and gas to heater and follow pilot lighting procedure,you may need to hold gas on for 60 seconds.

Here is a picture of the thermocouple so you know what to look for.


http://thermocatalytic.com/Thermocouple.JPG
http://homerepairgeek.com/wp-content/uploads/2010/12/furnace-thermocouple.jpg

Feb 10, 2011 | Honeywell Programmable Thermostat Heater

1 Answer

Heater will fire but wont stay lit.


I assume that you are referring to a natural gas forced air furnace. If so you just described the symptoms of a dirty flame sensor. Remove the sensor with a 1/4" nutdriver. clean the flame sensor with a small piece of fine grit sandpaper or emery cloth. replace the sensor and turn the furnace back on.
Good luck.....

Apr 11, 2009 | Heating & Cooling

1 Answer

I have a goodman gmpn 100-4 REVB furnace that will not stay lit


If the igniter lights the burners the ignitor..... is not bad. Its like a light bulb.... it works or ot doesn't.
You are describing a dirty flame sensor. Dishonest contractors will sell you a new ignitor but clean the flame sensor when the are installing the ignitor. It is located at the opposite end of the burners than the ignitor. It has one wire going to it. Remove it and clean the rod with a piece of fine grit sandpaper. this should be done every year before heating season.
Good luck

Mar 28, 2009 | Goodman GMS90703BXA Heater

2 Answers

Rheem criterion II flame stays lit for a few seconds then only cold air blows through the house


Your furnace needs a tune-up. MODERN FURNACES REQUIRE REGULAR MAINTENANCE!

Mar 10, 2009 | Goodman GMS90703BXA Heater

1 Answer

Ignition failure code on


Sounding like a flame proving device is failing to sense flame. Try to clean the device with some steel wool. It is located right next to the last burner looks like a thick wire. Take the steel wool and gently rub the carbon that has built up off. Should only take 4 or 5 strokes. Let me know it that did it. Ken

Nov 30, 2008 | Coleman Propane Forced Air Heater...

2 Answers

Heater not staying lit


my furnace pilot light is on but the burners will go off when we put the thermostat on auto. if we keep the fan on the burners will light but turn off the fan and and the burners go off

Mar 01, 2008 | Goodman GMS90703BXA Heater

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