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Tappan Microwave shuts off after a few seconds

If your Tappan microwave shuts off after a few seconds, stops after 3 seconds, or keeps shutting off during a cycle, start with the door switches. A failing primary door switch, secondary door switch, monitor switch, or interlock switch can have intermittent continuity and may show overheating, arcing, or burning. Next, check the microwave micro switches the same way with a multimeter and replace any damaged or inconsistent switch. If the switches test good, the main control board is the next likely cause, although control boards are often misdiagnosed and should be replaced only after the more common parts check out. A defective touchpad and control panel can also make the microwave turn off after a few seconds, especially when some buttons respond and others do not. The touchpad alone is less common, followed by the control board. Enter your Tappan microwave model number to find the exact replacement part for your specific appliance. Any repair that requires opening the outer cabinet must be handled carefully because the high-voltage capacitor can store a lethal charge even after the microwave is unplugged. Proper capacitor discharge is required before interior work, and this repair may require a qualified technician if you are not familiar with that procedure.

01 - Tappan Microwave Door Switch

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.
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02 - Tappan Microwave Micro Switch

A micro switch might be failing intermittently. Check each of the micro 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.
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03 - Tappan Microwave Main Control Board

Control boards are often misdiagnosed—before replacing the control board, first check more commonly defective parts, particularly the door switches. If all of the other components are working properly, replace the control board.
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04 - Tappan Microwave Touchpad and Control Panel

To determine if the touchpad and control panel are defective, try pressing each of the buttons on the control panel. If some of the buttons respond correctly while others don’t, replace the touchpad and control panel.
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Highly Likely

05 - Tappan Microwave Touchpad

If the microwave runs for a few seconds and stops the touchpad might be at fault. This is not common. Generally speaking, if the microwave display is working and some of the buttons respond correctly but some don’t, the problem is with the touchpad.
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Highly Likely

06 - Tappan Microwave Control Board

Control boards are often misdiagnosed—before replacing the control board, first check more commonly defective parts, particularly the door switches. If all of the other components are working properly, replace the control board.
Shop all Tappan Microwave Control Board Parts
Common

Frequently Asked Questions

Why does my Tappan microwave shut off after a few seconds?
Could the touchpad or control panel cause my Tappan microwave to stop after 3 seconds?
Can I test the parts when my Tappan microwave stops running after a few seconds?
How do I find the correct Tappan microwave door switch or touchpad replacement?
What should I do if my Tappan microwave turns on when the door opens or turns on by itself?

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