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Microwave Oven Repair & Maintenance
Whether you are working on a countertop or over the range(OTR) model, microwave oven repair can be extremely dangerous. One of the main components in the heating circuit, called the capacitor, can store over 20,000 volts of electricity. That can definitely kill you, so extreme caution must be taken when diagnosing your microwave oven.
Microwave oven repair can be one of the more complicated kitchen appliance you will have to repair. All brands are pretty much the same on the inside and work off the same diagnostic skills to repair. One thing that is a must for microwave repair is the “tech sheet”. Tucked away somewhere in the unit, it will help you fix the unit.
Over the range microwave’s(OTR) tech sheet will either be hidden behind the vent in a crevice or behind the console panel. Countertops and most built-in microwaves have the tech sheet in an envelope after you take the outside shell off.
Most microwaves have an electronic control and digital display. Even with having an electronic control, most microwaves do not have error codes to help you with microwave oven repair.
ommon Problems & Troubleshooting
First we will list some of the more common problems you will encounter in microwave oven repair. Then we will get into the troubleshooting and diagnosing of the part(s).
No Lights or Power, Unit seems Dead The voltage to the unit is good.
Lights come on, but can not program unit, Touchpad dead
Microwave Runs, but no Heat Turntable rotates, acts like it is heating but doesn’t. This is the big one, many possibilities.
Microwave Runs, Heats, but turntable does not move
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Microwave is arcing
Microwave Vent Hood is not working Over The Range(OTR) Models.
Microwave Stove Light not Working OTR models, light bulbs good.
Microwave overheats and keeps turning off
These problems are common to all types of microwaves.
Before getting to the testing for microwave oven repair, here is some warnings. Your microwave is hooked to a 120 volt power source which can shock you, extreme care should be followed. When testing a microwave, always have a glass of water inside the microwave, you should never operate a microwave empty. Damage will occur to unit. Also read the following warning.