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Roper Microwave not working

If your Roper microwave is not working, not turning on, or seems dead, start with the line fuse, the most likely cause. A blown line fuse prevents the microwave from starting, but investigate what caused it to blow before installing another one. If your Roper microwave has power but is not working, inspect the switch holder and door switches next. A damaged or misaligned switch holder may keep the primary, secondary, or monitor door switch from actuating when the door closes. The main control board can fail, although it is rarely the problem and should be considered only after testing the more common parts. An open thermostat may stop voltage from reaching the high-voltage components if the microwave overheats, while a blown thermal fuse can also cut power and cannot be reset. Confirm the outlet has power and check your home circuit breaker or fuse. Enter your model number to find the exact replacement line fuse, switch holder, thermostat, thermal fuse, or control board for your Roper microwave. Any repair that requires opening the outer cabinet, including fuse or control-board replacement, involves a high-voltage capacitor that stores lethal charge even after unplugging. Proper capacitor discharge is required, so use a qualified technician if you are not familiar with the procedure.

01 - Roper 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 - Roper 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 - Roper 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 - Roper 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 - Roper 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

07 - Roper Microwave Control Board

Since the control board controls the voltage being sent to all of the microwave's components, a defective board could be responsible for a microwave not working. 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 control board.
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Common

Frequently Asked Questions

Why is my Roper microwave not working but has power?
How do I test or replace a Roper microwave fuse?
Why won't my Roper microwave start when I close the door?
Could a Roper microwave main control board be causing it to stop working?
How do I find the correct Roper microwave replacement part?

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