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Glow plug ignites flame but extinguishes after a few seconds

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There is a white\or silver flame sensor in the middle of the furnace it hangs down into where the gas goes out of the tubes,clean it with a piece of sand cloth try not to touch it with your fingers after the oil in your skin can "fool" it if it still doesnt work replace the sensor that should take care of your problem a new sensor should run 20 to30 dollars

Posted on Oct 14, 2008

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Posted on Jan 02, 2017

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Sg7800 maytag dryer stopped giving heat


Sounds like burner not igniting. On front of dryer in the lower right there should be a gas valve/burner access panel. Usually you just have to pry out at bottom of panel & swing out and up to remove. This gives you access to valve coils and igniter. With panel removed set timer for heated dry and start dryer, observing first the igniter which should glow bright orange-red, then after a couple seconds you should hear a "Click" which is gas valve opening and a blue flame ignites for heat. If no glow is seen after a few seconds or at least a minute, igniter is bad, if it does glow and no click is heard from the gas valve, the coils (electro magnets) on the valve are bad, or the "Flame present" sensor is bad. Chances are it's either the coils or igniter.Try this on all heat settings, if you get heat at only one setting it might be in timer contacts, but not common. Again you can repair/replace both the igniter (usually just plugs into a receptical) and the coils (2 donut looking objects on the gas valve, replace both.) Access door may be on back if not on front, but normally their on lower right of front.

Feb 13, 2011 | Dryers

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Glow bar starts, gas valve opens, gas start burning in all four ports, glow bar turns off and gas valve closes. no flame roll-out is it the board bad?


Depending upon how long the burners stay on it could be a bad or dirty flame rod, read on.
On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Jan 16, 2010 | Goodman Heating & Cooling

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Furnace ignites when thermostat calls for heat, runs for a few minutes and the burners extinguish, repeats... changed flame sensor, nodifference, saw 4 quick red flashes evry few seconds after burners...


You don't say if the blower is coming on, no blower would cause the limit to open. By the way, the limit is internal and auto-reset, not the manual reset roll out switches on the burner assembly.

Jan 11, 2010 | Goodman Heating & Cooling

1 Answer

My york diamond 80 fans come on and I can see the glow then it fires before cutting off after 5 seconds, is this a bad ignitor


Bad or dirty flame rod or burners.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

Jan 09, 2010 | Heating & Cooling

3 Answers

My heat n glow fireplace comes on fine with all burners running but shuts off about 5 seconds later. it seems the sensor that detects a flame thinks the fire has not started and shuts down the gas. Is...


You may have a few sensors, one may be a thermopile that energizes the pilot. It is a very thin but long bulb located in the pilot flame. Then you may have something called a thermopile which is also located in the pilot flame that energizes the main gas valve. It is a larger diameter bulb and will have metal wrapped wireg going to the gas valve. If the pilot stays on but the flame goes out under the logs, change your thermopile and look for a bad connection at the gas valve or switch. If both the main burner and the pilot goes out you may have a gas valve problem or a plugged vent pipe. If the flame just disappears it is most likely a gas valve. If the flame changes colors and lifts from the burner, that is a sign of a plugged vent. Good luck.

Nov 04, 2009 | Leisure HOMEPRIDE Electric Fireplace...

1 Answer

My Kenmore gas dryer runs but it does not dry.


Obviously make sure the gas supply valve is open and gas is going to the unit.
Then determine if the burner is lighting at all... there is a small plastic plug in the lower left of the front panel. If you remove this plug you can see the burner assembly.
When the drier powers up you should see a glow plug that gets red hot, then a click (the solenoid opening) then the burner should light and you should see a blue flame.
If this does not happen, the glow plug will go out and then in a minute or so, the process will start again with the glow plug and the click.
If this cycle repeats without ANY lighting of the burner, you need to replace the burner assembly and/or safety valve... send the model number and I'll show you the parts.
If the burner lights for a few seconds and then extinguishes, it is probably a faulty flame sensor, which is a probe extending into the path of the burner flame about in the middle of the burner assembly (It makes sure the flame is lit and if it doesn't get hot enough it closes the gas valve to avoid filling your laundry area with gas). You can try cleaning it, and then replacing it. Again if you give me the model # I can help you...

Oct 11, 2009 | Kenmore Dryers

2 Answers

Dryer starts but flame extinguishes after a few seconds


it is clear from your reading symptoms that is asensor thermostat problem
thanks

Jul 11, 2009 | Dryers

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