Whirlpool WP3399639 Temperature Selector Switch OEM Part

I replaced the cycle switch, fixing the lack of heat. The timer switch replacement fixed the auto cool down. I watched a cycle switch replacement on Youtube, demonstrating removal of the top console, which answered the only question I had about the repair. The timer switch was a hundred bucks. The only thing to be said about that is that it was a lot cheaper than a repairman or replacing the dryer.

I replaced the cycling thermostat first...but that wasn't the problem. All other components (thermal fuse & high-limit thermostat) checked out. I couldn't find any video online that specifically dealt with testing the cycle switch; however, the diagram on the back of the switch indicated a resistance that should exist across two of the contacts; mine didn't read accordingly (with a multimeter)...so I rolled the dice and bought the cycle switch. That was indeed the problem. While at it, I cleaned all the lint paths, replaced the lint trap and lint chute seals, and installed a new belt. The bottom-line cost was cheaper than calling a serviceman, and my dryer is like new again!

Replaced the switch

My husband determined it was the temperature switch, so we ordered one. It arrived just 4 days later, even with the Christmas holiday right in the middle. Reinstalled the switch...dryer is working great.

Replaced high-limit thermostat, thermal fuse and thermistor and heating element. This created sufficient heat but other problem arose. Replaced timer and heat selection switch and all works fine now. Remember to clean out duct work while working on dryer -- obstructed duct work is a primary cause of blown fuses etc and if you don't clean it out you will just blow the new installed fuses as well.