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Goodman GMP050-3 System started intermittently failing to sustain flame It would begin burn for 3-5 seconds and then shuts off. On 2nd try 1 - 2 seconds. Subsequent tries, light then immediately turn off. I replaced flame sensor. Still doing the same. Gas Valve or Control board?

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It sounds like you are on the right track. Be sure you can take back the parts if they do not solve the problem. Most flame sensors to go bad over time.

Posted on Dec 11, 2014

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Goodman Furnace gms91155dxa not staying on. The system ignites, but shuts off after 3 minutes. 1 blink LED system light


100% sounds like an electrical problem, something is not allowing it to go into a duty cycle.

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Inductor blower comes on and runs then the ignitor glows flame comes up and burns for approx. 10-15 sec then goes out then fan comes on. Model number is PBKMLB12N0B0F I believe this is a goodman furnace.


I cleaned the sensor that was at the the right further most burner on my Goodman and it worked. got the answer to my problem here at fixya. My burner flame only lasted 5 secs before it shut off. Thanks to all who took the time to send me a response.

Nov 13, 2010 | Goodman Heating & Cooling

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The furnance ignites for about ten seconds the right befor the blower comes on the furnance goes out. This repeats itself over and over until the unit shuts itself down.


Take out the flame sensor and clean it with a piece of sand paper or emery cloth and put it back in and this should get sustained flame.2e77348.jpg

Feb 25, 2010 | Goodman GMS90703BXA Heater

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Goodman Model C16-28 1FF is not able to heat my basement. The burners igniting but only fire for approximately 5 seconds. This cycle continues about every 60 seconds. At times the burners only stay on for...


Sounds as though your issue lies within the flame sensor.

The flame sensor senses that there is flame present once there is a call for heat. It sends its signal back the board or ICM and the furnace operates as normal. If no signal is sent, then the furnace automatically shuts down as a safety procedure. The furnace will attempt to light several times before shutting down on a fault code or lockout.


The number 1 reason for flame sensors to fail is they are dirty. Check the sensor for dirt build-up. Clean the sensor with a damp rag or a scratch pad. Inspect the grommets for crackings. Also check and clean all grounds. If this doesn't work, you will need to replace the sensor or call for a service technician to ensure the sensor is the only issue at hand.

Jan 08, 2010 | Goodman Heating & Cooling

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Model #GMPN100-4 Goodman furnace. Vent fan


The sequence of events for furnace operation is -

Fan purge for 30-45 seconds. During this time, a pressure switch is actuated by the running of the purge fan, proving the control board the purge fan is running.

After purge and purge prove, the hot surface ignition and or spark begins. After a few second delay, the gas valve will open. The control board then monitors for flame prove through another sensor located near the burners. If there is no flame within 3-5 seconds, the gas valve closes. It will repeat this process, usually 3 times, before it shuts the system down, which requires a power down of the system to reset.

I have seen trash get into the hose between the purge blower and the purge switch. But you could be having other problems.

Dec 17, 2009 | Goodman Heating & Cooling

3 Answers

I have a goodman gmp100-4 gas furnace and the gas comes on but shuts off in around 30 seconds, then tries again and the same thing... can i get some help please?


On the last gas venturi tube there should be a flame sensor located in the flame to prove it exsists, if its coroded the spark can,t jump back thru the moisture molecues in the gas to prove it has a flame to tell the circuit board to keep the gas comming. Just reomve the flame snsor and sand itand replace itback. T. Y. V. M.!

Dec 01, 2009 | Goodman GMS90703BXA Heater

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Furnace starts properly, then shuts down, led flashes 8 times


The first thing to look at is the flame sense rod.
Shut off power to the furnace, remove, clean sensor with steel wool or sandpaper then reinstall the sensor. Reapply power and it should run properly.

Jan 10, 2009 | Goodman GMS90703BXA Heater

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My 90 + goodman starts up then when blower starts the flames go out i can hear a clicking in the bottom of the unit and the exhaust fan shuts off then i can hear it kick on and the furnace trys to start up...


if you get a flame for about 2-3 seconds, than is goes right out, it would be a flame sensor, get some fine sand paper and clean it reinstall and should work fine, the flame sensor would be on the left hand side normally on goodman , looks like a stright rod with only 1 wire going to it, normally a white wire.

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1 Answer

I have a problem with my heating system. It is about 10 years old and has had the ignitor, combustion blower motor, and programable thermostat replace in it's lifetime. The system worked great last year....


sounds like its not proofing flame. it has a sensor usually like a needle sticks out into the flame that tells the gas valve the flame lit and is burning so its ok to keep sending gas, if its fails to proof flame then burner shuts down, then it tries to relight 3 times then locks out on fail safe. the blower will sometimes run continually once that occurs to highlight a failed condition. every time you reset it will try again 3 times then shut down. lp gas is very dangerous, even i do not work on it as the gas acts like gasoline and lays around. not like natural gas that disperses well. if you see the flame sensor try gently cleaning it with a little emory cloth. also a loose ground can cause this. check tio be sure any green wires are snug , they actually flow volts to ground through the flame on some to proof, thats why no ground no flame. if that fails then the board is most likely problem. change wire for wire , or get generic replacemant and follow directions exactly. good luck.some ignitors act as a flamre proofer as soon as they are done igniting! rarely do they fail to perform both funtions.

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