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If you are having problems with your gas dryer not heating
the most common problem is that the ignitor goes bad. Even though it glows
sometimes it is still not working properly.
The issue you are facing is due to the thermal fuse. If the thermal fuse is the problem, the dryer wouldn’t run.
First of all verify the voltage for the dryer by using multi-meter to measure the voltage at the dryer outlet to make sure you have 240v because the dryer motor only needs 120v supplied by one of the lines to run. But the heating elements, on the other hand, need 240v supplied by both lines to get hot.
If the voltage is ok, then the most likely bad parts are given below. As always, you should use your meter and the tech sheet supplied with your dryer (hidden inside the control panel) to verify:
1. Even Heat Board
2. Heater Relay
You need to check and replaced the bad parts to resolve the issue you are facing with.
Please do rate this solution as FixYa and revert for further assistance.
You need to make sure you have 220V first all the way to the dryer. Make sure you have no blocks (lint blockage). Check your thermostats for continuity. Make sure all the wires are disconnected when testing. If they show good check your heating element not only with the ohm meter but take it out and visually inspect it. They can be bad and show continutiy.
You may need to do some troubleshooting. This can be done with the machine unplugged - you may have to activate the start switch, belt switch (if it has one) and the motor centrifugal switch manually.
Tip for troubleshooting 220v systems - clip one lead of a ohm meter to either L1 or L2 on the terminal block. It doesn't matter which one. According to the tech sheet (under console) follow the path for current from your clipped terminal, through the heating element, to the opposite terminal. All the readings should be less than 100 ohms, until you reach the failed part. Confirm failure by disconnecting a lead from the suspected part, and test only that part.
Live troubleshooting is sometimes slightly easier, but much more dangerous than the procedure described above. - It is definitely not recommended for beginners, or for professionals, if it can be avoided.