Name: Door Switch
Brand: Sharp
SKU: i4960031
Price: 18.73 USD
Availability: InStock

Protect internal parts with this genuine OEM waveguide cover, part number 5304523276, for select Frigidaire Microwaves.

Waveguide Cover

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401.80083700

EMP672W

JMC9158BAS

JMV8166BAS

JMV8208BAS

JMV9169BAP

ME16H702SES

ME18H704SFS

MMV1153BAS

Microwave not heating

Microwave door switch, normally open two terminals. Rated for 16 amps at 125 or 250 vac

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, the microwave will not start or heat. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches does not have continuity, replace it. (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 a door switch.)

Microwave not working

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 fail, the microwave will not start or heat. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches do not have continuity, the switch or switches should be replaced.

Microwave light bulb not working

A defective door switch may not signal the control board that the door is open or closed which may prevent the microwave light from turning on or prevent the button that controls the light from functioning. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches do not have continuity, the switch or switches should be replaced.

Microwave shuts off after a few seconds

A door switch might be failing intermittently. Check each of the door switches for signs of overheating, arcing, or burning. If you don’t see any obvious signs of failure, use a multimeter to test each switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.

Microwave buttons not working

If none of the microwave buttons are working, you should use a multimeter to test the door switches for electrical continuity. If one of more of the switches test negative for continuity, the switch or switches should be replaced.

Microwave turns on by itself

A microwave that turns on by itself can be caused by a malfunctioning door switch. You can use a multimeter to test the door switches to determine if they are functioning appropriately and replace if necessary.

Microwave is sparking or arcing

If the microwave is sparking or arcing in the cabinet area, and not in the oven cavity, you will likely see smoke or there will be a burning smell. One of the appliance's door switches could have shorted and is causing the sparking or arcing. You should inspect each door switch for burn marks or damage and test the components with a multimeter to determine if any the door switches are malfunctioning.

Microwave exhaust fan not working

A defective door switch may not signal the control board that the door is closed, which can prevent the button that controls the exhaust fan from functioning. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches do not have continuity, the switch or switches should be replaced.

Microwave is tripping circuit breaker

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 fail, the microwave line fuse can blow, or the circuit breaker may trip. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches lack continuity, replace the defective switch. (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 a door switch.)

Microwave producing a burning smell

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 the door switch has burnt contacts or the terminal connections are loose it will produce a burning smell. Inspect the door switches. if the switch smells burnt or has burnt connectors replace the door switch. (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 a door switch.)

Microwave won't turn off

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 fail, the microwave will not start or heat. In some rare cases a door switch may short out and allow the fan to run even when the door is opened. To determine if any of the door switches are defective, use a multimeter to test each of the switches for continuity. If any of the door switches lack continuity, replace the switch. (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 a door switch.)

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Door Switch

Switch

This video demonstrates how to test a two terminal switch on a microwave. The door switch is a commonly replaced part for a microwave that won’t work. Other commonly replaced parts for a microwave that won’t work: Line fuse Main control board Thermal fuse Thermoprotector All of the information provided in this part testing video is applicable to the following brands: Amana, Frigidaire, GE, Kenmore, LG, Maytag, Panasonic, Samsung, Sharp, Whirlpool

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Microwave Sparking/Arcing — Microwave Troubleshooting

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Microwave buttons not working? This video provides information on how to troubleshoot a microwave oven and the most likely defective parts associated with this problem. Commonly replaced microwave parts: Turntable Motor Touchpad Control Board Magnetron Diode Transformer Fan Motor

QSWMA168WRZZ Microwave Door Switch

This part QSWMA168WRZZ is compatible with:

Related Articles & Videos

Door Switch Customer Reviews

Common Problems Fixed by the Door Switch

Microwave shuts off after a few seconds

Microwave is sparking or arcing

Microwave exhaust fan not working

Microwave is tripping circuit breaker

Microwave won't turn off

Microwave not heating

Microwave light bulb not working

Microwave producing a burning smell

Microwave not working

Microwave buttons not working

Microwave turns on by itself

About the Door Switch

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