During an electrical storm we had a power surge. Our microwave (above stove type) will not heat now. Everything else works, clock, lights, etc., except the high fan setting. Low fan works ok. Can the microwave be saved or is it trashed? We just bought it in October, 2009.
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You might try pulling the plug on the unit and leaving it overnight. The electronics may have locked up due to irregular voltage during the failure.
There may also be a GFI (ground fault interrupter) on that circuit that has tripped for the same reason.
Check the kitchen outlets for a tripped GFI.
Inexpensive fix yes, but quite dangerous as you have to either replace the High voltage Diode or the magnetron depending on what has gone. Most often it is the Diode as that is fed a few thousand volts and anomolies such as a surge in current cause it to blow(popping sound) You can also check the fuses and if lucky it is just a fuse, but a fuse very seldomly just blows as it points to an underlying fault such as magnetron , capacitor or Diode. Have a service man attend to it unless you know what you are doing as you are dealing with lethal voltages and current even after the microwave has been switched off.
Usually there are 3 or 4 mounting bolts located in the floor of the cabinet above. First you will have to disconnect the power and then the duck work if the unit is ventde to the outside. To remove the unit requires two people, one to support the unit and the other to remove the bolts. If you are doing it alone, quite difficult, you'll have to juryrig a deadman support. Ther is a wall plate behind the unit that has a lip that the back bottom of the microwve is locked into. After the bolts are removed slowly lower the front until you are able free the unit from the lip of the support plate.
Yes, There are fuses inside the keyboard panel. I would have to take a look at the manual for the specific model you have to identify the easiest way to check the fuse. Before you go that far check above the hood and see if you can locate the plug end of the microwave. Most installations have a dedicated receptacle above the exhaust vent and microwave. It is usually a space too small for good storage so most housewives store small items and cookbooks in this space. It is usually the culprit for a microwave suddenly going out without someone placing metal inside the oven and heating it. Heating a metal object or operating a microwave for an extended time will usually blow the fuse.
you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt
power spikes are very damaging to a microwaves internal parts, it sounds like your transformer and/or magnetron are blown. if the unit is out of warranty I would recommend calling a repairman or getting a new microwave (the transformer & magnetron are expensive and dangerous to work on) also get a small single plug surge protector for the new one.
If the stove was on without the hood fan's being on, it could have put too much heat in the "innards" of the microwave.
It may have opened the thermostat or thermal fuse located inside - either on the chassis of the microwave or or the magnetron.
It will look something like the one in the attached photo.
For helpful exploded view diagrams and to order any needed parts, you can visit the GE parts Web site or the Sears parts Web site at
http://www3.sears.com/ (the 3 is correct)
In my profile, you can find a link to my site, where you can find critical safety & disassembly tips.
Post back if you need more help.