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Montgomery Wards Microwave not working

If your Montgomery Wards microwave is not working, has stopped working, or has power but is not turning on, start with the line fuse, the most likely cause. A blown line fuse prevents the microwave from starting, but the electrical problem that caused it must be corrected or the replacement fuse may blow again. Next, inspect the switch holder and door switches. A damaged or misaligned holder may keep the primary, secondary, or monitor switch from actuating when the door closes. The main control board can fail, but it is rarely the cause and should be considered only after more common parts test good. A thermostat or thermal fuse may also open if the microwave overheats, cutting power to the high-voltage components. Before replacing any fuse, test the wall outlet and check the home circuit breaker. Any repair that requires removing the outer cabinet involves serious electrical danger: the high-voltage capacitor can store a lethal charge even after the microwave is unplugged and must be properly discharged before interior work. If you are not familiar with capacitor discharge procedures, use a qualified technician. Enter your model number to find the exact Montgomery Wards replacement part for your microwave.

01 - Montgomery Wards Microwave Line Fuse

If too much current passes through the microwave circuitry, the line fuse will blow. If the line fuse blows, the microwave won’t start. To determine if the line fuse is at fault, use a multimeter to test it for continuity. If the fuse does not have continuity, replace it. In addition, you should investigate and resolve the problem that caused the fuse to blow. If you don’t resolve the underlying issue, the new fuse will blow too. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the potential for electric shock, i...t is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace the line fuse.)
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02 - Montgomery Wards Microwave Switch Holder

The microwave switch holder is the component that houses the door switches behind the control panel. If the switch holder is damaged or misaligned, one of more switches may not be actuated when the microwave door is closed, resulting in the microwave not working. You will need to uninstall the control panel and inspect the switch holder to confirm it is in good condition and secured properly. Replace the switch holder with a new one if necessary.
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03 - Montgomery Wards Microwave Main Control Board

The main control board might be defective. However, this is rarely the case. Control boards are often misdiagnosed—check all of the more commonly defective parts. If you have determined that all of the other components are working properly,replace the main control board. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace the main control board.)
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04 - Montgomery Wards Microwave Thermostat

If the microwave overheats, the thermostat trips to cut off voltage to the microwave. If the thermostat is shorted open, it may not allow voltage to reach the high voltage components. To determine if the thermostat is at fault, use a multimeter to test it for electrical continuity. If the thermostat does not have continuity, and it cannot be reset, replace it.
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Highly Likely

05 - Incoming Power Problem

The electrical outlet may not be getting power. To determine if the outlet is getting power, try plugging something else into the outlet. If the outlet is not getting power, check the home circuit breakers or fuses.
Highly Likely

06 - Montgomery Wards Microwave 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 does not have continuity, replace it. The thermal fuse cannot be reset—if the fuse is blown, it must be replaced. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Due to the potential for electric shock, it is extremely dangerous to replace the electronic components in a microwave. Only a licensed technician should replace the thermal fuse.)
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Common

Frequently Asked Questions

Why is my Montgomery Wards microwave not working but has power?
How do I replace a Montgomery Wards microwave fuse if it will not turn on?
Can a bad door switch holder cause a Montgomery Wards microwave to stop working?
Could a thermal fuse or thermostat be the reason my Montgomery Wards microwave stopped working?
How do I find the correct Montgomery Wards microwave part using my model number?

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