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LG GAS DRYER NOT LIGHTING THE SECOND TIME AFTER COLD START. IGNITOR COMES ON: SENSOR SEES IT IS HOT ENOUGH AND GAS VALVE OPENS. FLAME COMES ON THEN GOES OFF WHEN TEMP IS REACHED BUT WHEN DEMAND FOR THE FLAME TO COME BACK ON THE GAS VALVE WILL NOT OPEN. WHEN DRYER COOLS DOWN TO ROOM TEMP THE GAS VALVE WILL WORK AGAIN. A ONE SHOT GAS VALVE. WHAT CAN BE WRONG??

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Ha... I was told it was the computer board. Haven't done anything yet

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If your vent is clear (strong flow of air at vent outlet outside) then you have a bad gas valve. I have seen this a few times on LG gas dryers. You really only need one of the coils on the gas valve, but they are not available individually. You have to get the entire valve.

Posted on Oct 28, 2008

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1 Answer

Whirlpool dryer heating sporadically?


Remove the lower front panel and turn dryer on. The ignitor should glow bright orange first. After Ignitor glows brightly the next thing will be the flame lighting as the gas valve opens with a click. All this should happen within about a minute or so.

If flame comes on but goes off quickly It's likely one of the Gas valve coils is opening a break in the coil as the coil heats up. This coil will shrink when cool and be able to run again. The coils are purchased as a kit.

If ignitor goes off and no flame comes on the coil kit is likely needed because one coil is fully broken inside its case. If flame goes on but shuts off shortly the problem is as described above and the kit is needed.

There is a flame safety assembly on the can above the burner. If the airflow is poor. the flame tip may activate that safety and turn the flame off. Or the flame switch may be open and not allow the flame to come on at all.

The Flame switch can be tested for continuity with an ohmeter but the valves may ONLY show bad with power applied and can not be tested with a meter as they will test good.. Good Luck

Nov 18, 2015 | Whirlpool Dryer. Gas Dryer. 7.0 cu. ft. in...

3 Answers

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


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

Jul 07, 2008 | Whirlpool Dryers

1 Answer

I have a LG dryer model dlgx3002w not heating.


It sounds like you didn't install the ignitor properly. Try re installing the ignitor, because it's opening the gas valve saying it's hot enough to light, but if it's out of position, it won't create proper combustion.

Nov 23, 2013 | Maytag Neptune MDG6800 Gas Dryer

1 Answer

Not heating during drying. everything else works


There are 3 things to turns on the heat. The ignitor, the thermal sensor, The gas valve. The ignitor has to glow first when you start. if it doesn't then it has a problem right there. After the ignitor comes on, and the thermal sensor has to produce some voltage so the gas valve can open to fire a flame then the heat will start. If the thermal sensor is bad, valve can't open then the ignitor will shut down, hence there is no heat.Taking the back panel off and try look to see the ignitor when you start so you can diagnose it correctly. Good luck

Apr 22, 2010 | LG DLG5932W Gas Dryer

2 Answers

Dryer won't get hot


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 gas valve coils may have to be replaced. If the gas ignites but does not stay on either the flame sensor or the coils are at fault.

Aug 12, 2009 | Dryers

1 Answer

My kenmore dryer will start and run when cold after it heats up the flame (gas dryer)goes out then after 3 or 4 mins. i can see the igniter light but will not start a flame after 5 or 6 seconds the igniter...


gas valve coulkd be bad if not opening after a certain period of time the ignitor will turn off and attempt a few times more,does it have a soilenoid valve also open and clean any carbon that might be built up over yrs

Jun 21, 2009 | Dryers

1 Answer

How do you light pilot light?


Dryer does not have pilot light.  There is an ignitor that glows when the dryer is started and lights the flame when the gas begins to flow.  With the front of the dryer off start it up and look for the glow. when it glows hot enough (or on a newer model it might be a spark) the gas should ignite.  When the flame sensor sees that the gas is ignited it shuts off the ignitor and keeps the gas valve open until the temperature sensor gets high and shuts it off.  When the temp sensor cools down the cycle repeats.
If no glow or spark-->bad ignitor If no gas flow-->bad flame sensor or bad gas valve coil If gas comes on and goes off quickly-->lint filter and/or vent pipe or outlet may be clogged or bad flame sensor.

May 29, 2009 | Whirlpool Dryers

2 Answers

Won't stay lit


You ignitor is working and sensor is working because it will fire up. so those pesky coils are intermittant because they get hot and quit cool off and work some more . replace them
cc8e664.jpgHere is a little ditty I wrote some time ago about this subject
INTERMITTANT COILS

Mar 07, 2009 | Maytag MDG6000 Dryer

1 Answer

No Heat


Hello
Welcome to Fixya


Remove the vent line from the rear and try the dryer.
If it heats then that means there is a clog or kink in the vent line blocking the vent air from exiting which will stop the dryer from getting hot!
If not then it's another one of these problems.

Defective Ignitor (Gas Only)
When heated the ignitor used on your gas dryer must obtain a specific high temperature
in order to activate the flame sensor. This ignitor is fragile and susceptible to cracking.
A hairline fracture that is barely visible to the naked eye is enough to change
the resistance of the ignitor to a point that is will not work properly.
You can test the resistance of your ignitor. You should get a reading of 50-400 ohms of
resistance.

If the ignitor gets hot and then goes off after about 10-15 seconds and there is
no ignition, the problem is probably not the ignitor. It is most likely the gas valve
coils that are defective.

If the ignitor comes on and stays on, it is the flame sensor that is defective.

If the ignitor is not getting hot it could also be one of the thermostats that is defective.
The power for the ignitor is passed from the timer, through all of the thermostats,
limit switches and fuses to the ignitor. So if you are not getting power to the ignitor
during ignition, you should check the continuity of the individual thermostats and fuses.
DRYER DOES NOT HEAT



Defective Gas Valve Coil (Gas Dryer Only)

If the gas dryer will light once but will not relight until it cools down, it is likely the gas valve coils are faulty. These coils loose some strength when subjected to heat. When they become old, the addition of heat may be enough to prevent them from opening the gas valve when hot. However the coils still work when when cool.

An easy way to diagnose the coils when the burner is not lighting, watch the ignitor. If the the ignitor glows for 10 to 15 seconds but no flame is created, then the coils are faulty. If the ignitor is not glowing the problem is elsewhere.

Recent Customer Symptoms:
The dryer burner doesn't always come on when starting. If the burner does come on, once it goes off if won't come on again until the dryer cools down.



Defective Flame Sensor (Gas Dryer Only)
The flame sensor's job is to monitor the ignitor for sufficient heat
to ignite the gas. A properly operating flame sensor will pass a
continuity check under room temperature.

Common Symptoms
If the flame sensor is defective in the open position,
the ignitor will not get hot when the dryer is started.
However, if it is defective in the closed position the ignitor
will get hot, but the flame sensor will not allow the flame to ignite.
In this case, the ignitor will usually stay hot for a long period of
time.



Defective Thermostat
The thermostats are responsible for maintaining the proper temperature
in the dryer. Check the exhaust temperature of the dyer and if the
temperature is above 150 degrees, you will most likely need to change
the operating thermostat.

The thermostat can also fail in the opposite mode.
It can prevent the element from heating at all.
A failed continuity check at room temperature will verify this condition.

There are some special thermostats that are single pole double throw.
These thermostats are often used to control the timer when set to the
Automatic Dry cycle. If the dryer timer will advance in the Timed Dry
cycle but not the Automatic Dry cycle, then the thermostat could be the
problem.


Defective Thermal Fuse
The thermal fuse is in series with one leg of power to the motor.
If the fuse is open (no continuity) the motor will not run.

Location:
The thermal fuse is located in different locations according
to the model and brand of dryer.

Solution:
Check the thermal fuse for continuity with a volt/ohm meter.
If it is open, it will need to be replaced






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Jan 25, 2009 | Kenmore 73952 Gas Dryer

1 Answer

Gas Dryer


There is a flame sensor that senses when the ignitor is hot enough to light the gas. If the flame sensor is bad the gas valve won't open. It also might be the valve itself. There are 2 coils that must open for the gas to get through the valve. If one of the coils is bad the valve won't open.

Jul 21, 2008 | Frigidaire FGR231A Gas Dryer

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