How to Troubleshoot & Replace Ge AP3994765 / WD21X10261 Interlock Switch

After Diagnosing the problem to be one of the interlock switch. I decided to replace both of them. It was a really easy job that anyone can do. It did not take long at all to get the parts (2 days). I knew the part was bad because the button on top the switch was stuck in the down position. The other one would not make a clicking sound so I suspect it was going bad too. To confirm my diagnosis, I test the switch for continuity and it failed. After I installed the two new switch, the dishwasher started working again. Hope this help. 

Checked thermal fuse and thermostats. with meter. All checked good. Then checked interlock switch which is also called belt switch. The switch was stuck and would work intermittently. Replaced switch which is easy to do. Put it back together and the dryer started immediately. Easy repair. Do be careful on dryer covers. Sharp edges on a few areas. 

I ordered the dryer drum drive belt, interlock switch, and door switch. Upon disassembling the dryer, it was clearly a snapped drum drive belt (the factory belt is thinner and probably less durable than the replacement belt). I replaced the belt and the switches to boot in under an hour. Parts and next day shipping under $100, which is what I would have paid for the factory service guy to come out in two weeks, before parts and labor to actually fix anything. The instruction videos didn't mention it, but there are some square drive screws in my particular GE dryer. I had an appropriate driver on hand, but it would have been annoying to need to find one at a hardware store on a holiday. 

I replaced the interlock and start switches and the dryer is now working. I replaced the start switch first hoping it might be a solution before taking apart the dryer to get to and replace the interlock switch. The start switch ended up being unnecessary, but I left it in place and proceeded to replace the interlock switch. We're now up and running. Thank you very much for your information and assistance. 

I followed with the video and easy to install the interlock switch. 

I replaced the switch. This required me to open up the dryer, disconnect the belt from the drum and replace the interlock switch. Reconnecting the drum and then the belt was a bit tricky but I had to keep playing with it. That YouTube video was a blessing from God. 

The belt tension switch was bad replaced . thanks to your video how to do it took me all of 20 minutes first time and worked great 

I took the dishwasher apart multiple times trykng to get the switch to work, but it was corroded. In the time I took trying to fix it, I could have orderd and had the part deliverd. Finally, I gave in and bought two switches (it had two switches only one of which was bad). They had a problem with shipping but they made it right. Switches arrived and it took less than five mintues to switch both out. Everything worked immediately. I saved the cost of a new dishwasher for $11.00. If you have a problem with an appliance look on Youtube for how to fix it and then order from these guys. They are the ticket! 

Replaced the idler spring switch 

I replace interlock switch