I have a Whirlpool microwave hood combination, model YMH1141XM. After changing a blown cooktop light, the clock works but nothing else turns on, including the fan, light, microwave. When I changed the light it popped and I smelled a burnt smell. We have replaced the bulb, and also the 20A fuse inside the curcuit board, but it still won't turn on anything other than the clock. Any ideas?
This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.
This can often also affect the exhaust fan operation, too. The lights and fan can be inoperable or stuck on too.
Details of our service and critical safety information and disassembly information is at our site, linked here on Fixya:
http://tinyurl.com/yzjozk
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