How to Troubleshoot & Replace Bosch AP4483082 / 00614767 Microwave Door Interlock Micro Switch

One of the three-door switches had failed. In my case, 00631512 or ref 25217585 on the left front of the unit. The green button no longer "clicked". When that switch fails, one of the ceramic fuses located under the top cover at the far back of the unit is blown. Used Volt-Ohm meter to determine which fuse. Happy to have also ordered a replacement door switch Support, just in case, as I was unable to remove the failed switch from the support without breaking a key brittle plastic tab. Separately, the unit also had a dim display, ultimately discovered unrelated to the loss of power. Had just prior replaced the microwave control panel & electronic control in case that was culprit, but door switch & fuse were a separate problem. I found it easier to access door switch support with the control panel re-removed. 

Had to identify the real issue by reading DIY threads. Found the door switch went bad after 1.5 years. To confirm I had to replace the fuses with the door open, turn the power on and close the door. If the display went out, the door switch is bad and blew the fuse again. Mine did just that. I replaced all three switches and the bracket holding them. Brackets are plastic and will break when removing the switches. After replacing and putting a new fuse, microwave worked again. 

I found several similar stories on AppliancePartsPros website related to this type of Bosch Microwave power failures, so I called their customer service to make sure that I ordered the correct parts for my repair. The agent was EXCELLENT and went above and beyond by checking all available parts diagrams to verify the parts I needed. Of the 3 switches in the door closing mechanisms one of the 2 on the left side of the microwave (as you look at it) was bad and the 1 located on the opposite side was bad. I needed 2 of the switches with a red button and 1 with a green button. (1 each red+green on left / 1 red on the right). Do get the supports for each sides switches. I ordered both and wound up using one for right side when pin that switch goes on broke. Also the fuse that blows is located in right rear corner of unit (there are 2) 1 was good / 1 bad. In addition to removing top of unit removing control panel allowed better access to switches. A lot of screws to remove but overall an easy repair. 

After 6 visits from repair technicians, I was frustrated and ready buy a new unit. I did some research finding this site, and found others who had similar problems. I also checked my micro switches for the oven door based on this forum, with the power off, performed the door check by replacing the fuses, turning the power on with the door open. The control panel powered on, I shut the door and it immediately blew the rear fuse like others stated. I ordered the fuses, the two mounting brackets and the three micro switches for less than 75 dollars delivered. It took me about an hour to change the switches and replace the covers. Powered the oven up and now it works. Saved 2000 dollars. Thank you to others for sharing their solution. 

One of the Door switches went bad, so I decided to proactively replace all 3 door switches. Make sure to order support brackets as well, as I think it's impossible to replace switches without breaking the original bracket. For a few $$, it's not worth the hassle. Interestingly, in my case, fuse that's internal to Microwave did not get blown, only main line breaker would get tripped, but I would be doing it again, I would also order spare fuse as well. Here is how I determined that door switch is bad. With MW door open, main breaker would stay ON and MW display would light up. Once the door is closed, main breaker would be tripped, cutting the power to the MW. 

I replaced all three micro switches as well as the plastic supports. I'm glad I ordered the supports as the plastic tabs broke removing the old switches. All the new parts fit perfectly and work as original. 

The repair went very well. The repair was easy, the only issue was getting the oven/microwave unit that weighed more than 200 lbs out of the built in cabinet so I could get to the parts. The parts were shipped to me very quickly and original replacement parts. The sales staff that I talked to were excellent. And your information you sent me after I got the parts was extremely helpful to the point I ordered the plastic holders for the switches, which one did break just like you told me it might when I removed the old switch. Thanks for all your great help and information. You are definitely in my contact list. 

Defective door switch. Installed new switch and all is well. Putting new switch support definitely helps as the plastic tabs break easily removing the old switch. 

By luck, it didn’t do it when I reset the breaker, while the microwave door was open. Only when I closed the door. I found an article on the forum with similar characteristics, suggesting one of the microswitches in the door had failed. For this model Bosch, there are two … I ordered both and began to remove countless screws, to get at it … not so hard, really, three sheet metal covers was enough to get to the assembly. The parts arrived quickly, and the microwave was back in place 30 minutes. 

Ordered parts that I received next day via expedited order. Replaced and returned to service.