Normal operationuntil after the gas lights and as the ignitor cools down the gas shuts off in 5-20 seconds. after a few minutes the cycle repeats. red led on steady. it happened a couple of years ago but it seemed to fix itself at the time. now it's doing it again Gary
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It begins its power-on cycle normally. First the updraft blower turns on
for a bit, then the HSI glows bright orange, then the gas turns on and
the flames ignite fully and the big blower turns on. About 3 seconds
after the gas ignites, it shuts off. That is the gas shuts off, the
blower continues for about a minute then it shuts off. This cycle will
repeat a few times, then usually after the second or third time
everything stays on and works normally
The gas turns on and off repeatedly all during the drying process. You could have a weak flame sensor. Sometimes these dudes take longer to cool down and regain continuity with age. Seen it.
here are a few reasons that you will get heat for a few min and then no heat.
1. if the vent is cloged, anywhere in the flexable hose to the wall or from the wall to outside. If the vent is cloged the flame in the unit will widen and the thermostat hi limit will shut she burner off untill it cools.
2. The coils for the burner could be bad and will allow the burner to light a couple of cycles and then will get hot and internaly disconect the coil untill it cools down and then will repeat and will get worse over time.
The good news :) The ignitor is good if it lights a flame, If the flame burns for more that 10 sec then the flame switch is mostlikley good. The main valve in most cases will also be good.
The gas flame will cycle on and off in response to the thermostat. Two minutes sounds about right for the dryer to warm up to temperature. The gas will shut off until the temperature cools down and then should cycle on again. Let the dryer run (either with or without clothes inside) and watch to see if the gas cycles on and off. If the gas does not come back on there may be a problem with the thermostat or auto sensor or the exhaust vent duct may be clogged.
It will shut down the heat if the vent or lint screen are plugged , are they free ? Also try washing off the lint screen with hot water, somtimes wax builds up on them from the sotener and wont allow air flow, you wont see it on the screen it is clear, but water will bead right up on it. easy checks before replacing a thermostat
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.
ckd coils on burner /valve they are probably breaking down..be sure you have good gas supply sounds almost like low or no gas pressure but believe you'll find coils bad
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