Everything appears to be working but doesn't heat up anything. Just found a placemat that was put on top of the microwave covering the vent. (child did this!) I'm guessing it hasn't been that long. A couple weeks at most. Could this have anything to do with it? We also unplugged and plugged it in again. Microwave is about 2 years old.
When you start the microwave say for 1 minute. Listen closely when you hit start, the light should come on and about a 1/2 second later you should hear a little click and a slight hum. This means the controller is turning on the high voltage transformer and that part of it is working. My guess is that the magnatron is bad. That's the most common problems with all brands of microwaves. The mat on the top should not have caused the problem since the microwave has heat shutdowns in it. I would say that it's a 90% chance it's the magnatron. Most microwaves have a 5 year warranty on that part. Look at your owners manual. Good luck.
Scott
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