Question about Goodman GDS80904BNA Open Flame Heater

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Flame dies after a couple of seconds

I have a goodman gmnt 60 unit is propane, it lights off  and I hear a click on the circuit board and the flame turns off is this a flame sensor on this unit and were is it located

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Yes there is look in the flame path of the last burner should be a one wire and the sensor looks like a hard L shape wire take it out and clean with steel wool or real fine sand paper

Posted on Jan 04, 2009

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I have a goodman furnace with a solid red light. Says normal operation, but ignitor does not light. Unplugged ignitor and still solid light. Could it be the circuit board or something else? Blower


Usually you can visually inspect the igniter, looking for any cracks or breaks in the element. The best way to check it is with a volt meter to see if your getting the 120v to the plug itself, putting your leads in each of the prongs on the plug. If you are not getting the voltage, it's usually the board. Make sure all connections are tight. The heating sequence will be: 1. Inducer motor starts 2. You will hear a click from the board, it telling the igniter to light. It should start to glow. 3. Next click will be the gas valve opening and flames on. 4. Blower motor starts. Hope this helps!

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Goodman gms80903bna light blinks once fan runs all the time,


I believe this code is ignition failure.
Turn power off and after 20 seconds turn power on with thermostat calling for heat. Vent blower should come on first. After a bit igniter should lite up. You should hear click noise of gas valve open up. If igniter does lite and you hear click noise, flame should come on for a few seconds minimum. If igniter doesn't lite and you hear click noise from gas valve, igniter is bad. If flame lites and then goes out, flame sensor probably needs cleaned. Both igniter and flame sensor are in metal plate under burners. Igniter has 2 wire going to it and flame sensor has one wire. If you think it is flame sensor you can remove with taking it out with 1 1/4" hex screw. Flame sensor will have white film on it if it needs cleaned, clean with steel wool or a dollar bill. If it isn't weither of these it is gas valve or circuit board.

Jan 27, 2011 | Goodman Heating & Cooling

1 Answer

I have a goodman GMPN120-5 funace, it comes on automatic lights okay, then burns for about 3-6 seconds and snaps off. I have changed the flame sensor. Is there anything else I can do to it, short of...


The flame rod needs a good ground and it's ground is thru the circuit board. Other than resecuring the ground wire on the circuit board, you will be looking at a new board.

Nov 28, 2010 | Goodman Heating & Cooling

1 Answer

Not staying lit


Remove the front panel and tape down the door safety switch so the unit can turn on when door is off. Turn up thermostat to make sure there is a call for heat. The circuit board should indicate a call for heat with either a blinking light or a solid light. Then the exhaust fan should turn on clearing the venting from any fumes. When the fan has ran for a few seconds, the igniter should start glowing orange. After it reaches a predetermined temperature, the gas valve should open with a click. The flame will start at the burner closest to the igniter and travel away from the igniter. There is a small flame rod located in the flame path on the last burner that tells the circuit board it feels the flame. If the flame goes off within a few seconds of starting, you have a dirty flame rod. Clean it with a scotch-brite pad. Once you get the flame to stay on for 90 seconds or so, the room air blower will turn on. If it tries 2 or 3 times to start but does not, the circuit board will record a code and display it with a blinking light. Look on the door panel for a wiring diagram. There will also be a Diagnostic chart that will tell you what the pattern of blinking lights represent.

Good Luck!

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1 Answer

Goodman GMNT 60 Furnace. Burners shut off after a minute and will not re-light. Board has one blink code says gas valve or flame sensor problem. Replaced flame sensor. Gas valve has a steady 24 volts and...


No, the board isnt out. The board has a code telling you that its out. Its your flame sensor. You wouldn't have gotten any heat if the gas valve was out. check if that flame sensor goes to another sensor on the same circuit , if it does check that. If it just a one wire sensor make sure its in the right position. If its a one rod flame senor with one wire I would sand it down with sandpaper. if its a two wire senor ohm it out to see if you ger current going through it.


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Oct 16, 2009 | Goodman Heating & Cooling

2 Answers

Goodman GMNT furnace goes into 'lock-out'.


The brain has to have constant verification of flame. If the burner ground is corroded then you will get the condition you prescribe.

Jan 08, 2009 | Heating & Cooling

1 Answer

I have a goodman GMNT gas furnace Propane it lights off I have a blue flame for about 3 seconds I hear a click on the circuit board and the flame goes out this is doing it constantly. could you please help...


Hi!!! If the flame turns on then off and on then you should change your flame sensor on the gas furnace..YEs flame sensor is shorted..The flame sensor is located by the valve burners it has one wire and is white..Good luck..

Jan 03, 2009 | Heating & Cooling

1 Answer

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.

Jan 02, 2009 | Heating & Cooling

1 Answer

Duct fan comes in, igniter lights, but no flame


Remove the front panel. Tape the door switch to the closed position. If the thermostat is calling for heat the furnace should do the following: a light on the circuit board will flash and then the exhaust blower will start. A few seconds later (10-15) you should hear clicking at at the circuit board and an orange glow should be seen thru the small viewing port. A few seconds later the gas valve should open and the orange light will turn blue. If the blue flame only lasts a few seconds and then goes out, their may either be a blockage not allowing the flame to travel to all the burners and not allowing a flame sensor to sence flame, shutting down the unit. After a few cycles of not starting, the circuit board will flash a series of codes that you can read if you look on the back of the front cover. It will give you a starting point where we can research and come up witha more difinitive answer. Let us know what you find for codes.

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