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Whirlpool dryer(LGQ9557HQ0), ignitor ignites but flame does not light

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  • cmaino Jul 07, 2008

    it has a flame ignitor, how do I get to these parts for this unit. tHE FRONT DOES NOT HAVE A KICK PLATE

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Mounted on top of the gas vavlve is black electrical coils when energized it opens the gas valve,if one of the coils are defective it wont open and let the gas thru,its hard to test the coils so most repairmen just replace them all

Posted on Jul 07, 2008

  • derek martin Jul 07, 2008

    its not the flame sensor cause it has no flame,if it had a flame then it stop and tried to relight again it would be a flame sensor

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I would suggest to read the info by clicking here to find out what could be wrong with your appliance.

Posted on Jul 07, 2008

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What type of gas ignition does your dryer have? I believe some have "spark" ignitors and some are equipped with with "glow" ignitors. If your dryer is equipped with a spark ignitor you should be able to hear a ticking sound when you first start the dryer. If your dryer is equipped with a glow ignitor you will be able to see it glowing white hot (usually by removing a panel from the bottom front of the dryer). If the ignitor is malfunctioning, the dryer will not heat...all it will be doing is blowing cold air. A bad ignitor is a common problem.

If the ignitor is working there could be a problem with the heat sensor. The heat sensor is a device that is heated by the gas flame and sends a signal letting the dryer know it is okay to keep the main gas valve open (just like a thermocouple on a hot water heater sensing a pilot light).

Hope that helps.....

Posted on Jul 07, 2008

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1 Answer

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The gas dryer assembly consists of a sensor, a ignitor, and a pair of solenoids. The flame sensor must have continuity when cold to fire up the ignitor. The ignitor must be hot and out of the circuit so that power can open them coils. So how do they do it? The control themostat is mounted very near the blower and filter housing. As the air passes by it on the way outside it judges air temp. When the temp drops below 105f the control powers up the gas assembly. The sensor, the ignitor, and the coils are all energized. The ignitor is wired cleverly so that while it is being powered by the flame sensor it takes up most of the energy required to open the coils. Once it gets heated up to ignition temp the bimetal inside the black box (sensor) shuts down power to the ignitor. It is so hot it is now a therm sensor itself. Full power goes to them coils and they can now open the valve. As the flame is ignited the 3rd wire on the holding coil is kept open by the heat from the ignitor which becomes a themo generator. Fascinating isn't it? My home movie:



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See also: http://home.howstuffworks.com/how-to-repair-a-dryer.htm

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See also: http://home.howstuffworks.com/how-to-repair-a-dryer.htm

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If gas: First thing to check is the ignitor underneath the drum. (You have to open the panel to see it) It should glow shortly after the dryer starts, then the flame starts and the ignitor shuts off. If the ignitor does not glow then it or the thermostat is bad. If the ignitor is glowing but the gas does not light then the flame sensor may have to be replaced. If the gas ignites but does not stay on either the flame sensor or the coils are at fault.

See also: http://home.howstuffworks.com/how-to-repair-a-dryer.htm

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See also: http://home.howstuffworks.com/how-to-repair-a-dryer.htm

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1 Answer

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If gas: First thing to check is the ignitor underneath the drum. (You have to open the panel to see it) It should glow shortly after the dryer starts, then the flame starts and the ignitor shuts off. If the ignitor does not glow then it or the thermostat is bad. If the ignitor is glowing but the gas does not light then the flame sensor may have to be replaced. If the gas ignites but does not stay on either the flame sensor or the coils are at fault.

See also: http://home.howstuffworks.com/how-to-repair-a-dryer.htm

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