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Thermador Microwave not heating

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Common solutions for: Thermador Microwave not heating
Solution 1:
Diode
The diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron to heat the food. If the diode burns out, the...
Required Part
Microwave Diode
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Solution 2:
Door Switch
Most microwaves have three or four door switches. When the microwave door closes, the door switches actuate in sequence to ensure that the door is closed properly. If any of the door switches fails,...
Required Part
Microwave Door Switch
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Solution 3:
Magnetron
The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. If the magnetron burns out, the microwave won’t heat. The magnetron is not...
Required Part
Microwave Magnetron
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Solution 4:
High Voltage Capacitor
The high voltage capacitor works with the high voltage diode to convert the output of the transformer to DC voltage and to double the output voltage. If the capacitor is burned out, the entire high...
Required Part
Microwave High Voltage Capacitor
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Solution 5:
High Voltage Transformer
Microwave ovens produce a very high voltage in order to power the magnetron antenna, which emits the energy that cooks the food. When a high voltage transformer fails, it will usually arc and have a...
Required Part
Microwave High Voltage Transformer
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Solution 6:
Thermal Fuse
The thermal fuse cuts off power to the microwave if the microwave overheats. To determine if the thermal fuse has blown, use a multimeter to test it for continuity. If the fuse doesn’t have...
Required Part
Microwave Thermal Fuse
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Solution 7:
Thermoprotector
The thermoprotector cuts off power to the microwave if it overheats. If the thermoprotector trips, the microwave won’t start or heat. To determine if the thermoprotector at fault, use a multimeter to...
Required Part
Microwave Thermoprotector
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Solution 8:
Main Control Board
The main control board might be defective. However, this is rarely the case. Control boards are often misdiagnosed—before replacing the control board, check all of the more commonly defective parts....
Required Part
Microwave Main Control Board
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