Why does my microwave not heat up food?
My microwave turns on and runs,display is fine,timer and all works but it just don't heat up anything!
joshua, for the longest time the consensus on iFixit is to replace the whole unit. Microwave ovens generate high voltages and dangerous amounts of radio-frequency radiation. Attempting to repair one is NOT for the amateur. I advise recycling it and getting a new one. On the flipside of this, you may just give us the serial number and we can try to find a common simple problem, but anything above that, you should leave to a professional.
I received a microwave to repair and resell a few months ago with the identical problem. Everything worked except that it refused to heat, so the problem was obviously not the ceramic fuse(s) hidden inside microwave ovens. I removed the outer cover, shorted the super capacitor so I wouldn't get zapped, and proceeded to investigate. I did go ahead and check the fuse just for the heck of it, but if it had been blown the microwave would have been totally dead. No lights, no nuthin'. I noticed that there were 3 micro safety switches on the door latch assembly. Upon testing each, I discovered that the top two were working just fine, but the third one at the bottom was not working. I proceeded to replace it with a like switch that I had salvaged from another appliance, tested the oven, and it has since worked perfectly.
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