Question about Bosch HBC 86Q650B Electric Single Oven

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Hello we have bosch hbc 86 and every time i want to turn on the microwave it suddenly stops, even when im trying to defrost,it starts and then in 3 seconds it turns off, please do you have a solution for this problem?

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My HBC 86 showed this behavior, after a fuse for the microwave operations was blown (remove the top cover and you will see it on a board close to the door). It's an 8A, medium speed. There might be different reasons, why the fuse is blown. In my case, the switches that detect whether the oven door is closed or open caused the problem. There are two connected with the microwave, one on the left (a bipolar switch) and another on the right. The switches will cause a short-circuit (and thus a blown fuse), if the left one detects an open door and the right one a closed door - it's an additional security feature. The problem can be caused by a blocked or slowly reacting switch. You might want to clean/replace the switches and/or put the right switch as far as possible away from the door so that it detects a close later (and open earlier). A good thing for testing: the problem occurs without actually starting the microwave.

Posted on Oct 27, 2011


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