How to Troubleshoot & Replace Whirlpool AP6008309 / WP3390719 Thermal Fuse (Disposable, One Time Fuse)

I fixed it myself was very happy with my order. 

I researched on the internet and it appeared that 3 things were possible... broken belt, bad switch, popped thermostat. Since the switch clicked, I assumed that was all right and followed Kenmore's instructions to get at the belt and thermostat. They said to take off the back.... wrong! The back doesn't come off. Through YouTube videos on my particular model, I learned to take off the front bottom panel first, then the main front panel. The belt was broken so I ordered a belt and just in case (since it was cheap), a thermostat too. They arrived the next day and I reassembled the entire dryer in almost no time. Taking it apart took hours as I learned. If I had to do it again now, I'm convinced I could do it in 1/2 hour, but the odds of needing that are pretty slim. Very proud of saving hundreds of dollars by calling a repairman. 

Used an ohm meter on the heating element to diagnos it. 

As a novice, I originally thought it was a fuse after checking to ensure it wasn't the circuit breaker. I ordered ($38) a Thermal Fuse and Moister Sensor Bars, using the associated videos on installing the parts (Very Helpful) - The key is having the right tools. Although this repair did not solve the problem, the next step was to order ($78) and install a heater element and thermistor. Again the installing videos were very useful and at this point I became very comfortable with working on this unit in replacing these parts which was very successful. My total parts cost was $116 and my dryer works great. Also had the opportunity to clean out the excess lint inside the unit that had accumulated over the years. It was very satisficing to be able to do it myself. As a side note, a local repair service wanted $ 139.00 just for the call and parts were extra. 

Troubleshooted and found the thermal fuse open and one gas valve solenoid coil bad. Ordered parts and replaced thermal fuse, gas solenoid coils, and moisture sensors. Very easy to replace all parts and parts came super fast! Saved me from buying a new dryer. (Voltmeter needed for troubleshooting) 

Went online and the igniter for gas dryer seemed to be the possible problem. replaced that and still did not work. Went back online and researched further to discover there is a thermal fuse in the exhaust venting which is a one time fuse. bypassed that to check and the dryer came on as it should. Ordered that part and all is good. Thank You for your online resources/videos which are very informative and easy to follow. 

Took off the front panel, removed one screw from a panel and one screw and two wires from the heating element, and put an ohmmeter across the terminals. There was no continuity, so replaced the element --- a matter of sliding the old one out, sliding the new one in, putting the wires back on and securing with the screws. Whole thing took about 10 minutes. 

I ordered 3 parts - Gas Valve Coil Kit, Thermal Fuse and a Thermister. (I probably only needed thr Gas Valve Kit, but since I had the dryer apart, I figured I might as well replace all 3 items!). I called customer service to verify that I had the right Thermal Fuse since the original was black and the replacement was white. The service tech verified that it was indeed correct for my machine and so I installed it - and it all works now! Great service, (and delivery time - 1 day!). I'll be using AppliancePartsPro from now on! 

Replaced the heating element and the Thermistor. 

Watch the YouTube tape on how to replace the heating unit. I pulled the unit from the Maytag dryer. I inspected the heating coil and found a brake in the coil. I put a new coil in. I saved the thermostat infused diet ordered for a future maintenance. The dryer runs great. As long as I had the corrected parts on the YouTube video, I was golden.