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If it's an HSI (hot surface ignitor) that glows, then usually the ignition control module looks at it's current draw, to assume that it's hot enough to ignite the gas. If the current draw isn't sufficient, then it won't open the gas valve.
If you see it glow, put your volt meter on the gas valve terminals to see if it gets energized. If it doesn't energize before it locks out, then let the HSI cool down to room temp and check the resistance of it. Compare that resistance reading to a new one (one that is worn will have a higher resistance than a new one - more resistance, less current draw!).
if you hear the valve clicking but no gas the valve is bad.when the burner lights theres a probe that senses that it is lit and sends a microvoltage back to the controller to tell its lit.check to make sure all ground wires are grounded to a clean metal surface.
sounds like bad gas coils located on top of the gas valve,when the coils start to fail the ignitor will glow,the coils let the gas in until the coils heat up and then ignitor glows but no gas.when the coils cool down they might work again for a short time until they heat up and fail again.if the flame lights and goes out after like 30 seconds and goes out and keeps doing this you have a block either in the dryer or the vent line but it sounds like you have bad gas coils.unplug the dryer,get at the valve,pull off the wires going to the coils and check them with a meter,one should be open,just remove the two phillips screws pull off the cover and slide the coils up off of the posts,unplug them and put the new coils on,you'll see like a little piece of plastic on the top of the coils,this fits intoo the cover so they line up correctly and holds them in place,also on the larger coil there's a spacer on the post,if you don't see it look inside the old coil,poke out the spacer and slide it onto the post and then install the coil.
when you turn it on give it a few minutes and see if you see a glow. that will be the ingnitor.if glowes low or dont see a glow at all then id say you have a bad ignitor. if you see a bright orange glow then id say your gas valve is bad. the ignitor is located next to the gas valve, usually their is a peep hole in the front of the dryer that you pop off (dime size cap) and you can look in hole and see if you see a glow. ignitor price roughly 20-50 dollars. vale can be pricey. 50-145.00 dollars part only. labor ingnitor 75-125 and for valve 85-165 depending on were you live and who you use. usually one or the other not both and seldom a thermostat could be bad.
Things that could stop a gas dryer from heating:
- glow bar igniter, thermal fuse ( not all models ), coils on the gas valve, gas valve, thermostats, motor heat switch, timer, selector switch, sensor.
A page for checking gas dryers is here.
Please do rate the solution and revert for further assistance.
igniter. Does it glow bright orange, then shut off without igniting the
gas? (When the gas ignites there's a large blue flame.) If so, there
may be defective coils on the gas valve. Mounted on the top of modern
gas valves, there are black electrical coils. The coils, when
energized, open the gas valve. If one or more of the coils are
defective, the valve doesn't open and the gas cannot ignite. Because
it's often difficult to properly test the coils, it's usually best to
replace both (all) of them at the same time.
If you are sure that your model is a Whirlpool LGR5636L gas dryer I can help you. But before we begin look inside the door on side of the door opening and send me (those numbers). Thanks, Sea Breeze email@example.com
Hi!! make sure that you have 120 volts going to the glow ignitor.the gas valve will not turn on the gas if the ignitoe wont glow..if it glows the check yout coil boosters they are round and are located by the gas valve.then if not you have a bad timer.they are usually round and are black..good luck..