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Sanyo Microwave won't turn off

Won’t your Sanyo microwave turn off? Keeps running, or stays stuck on after you press Cancel or Off, start with the door switches. A failed primary door switch, secondary door switch, monitor switch, or interlock switch can short and allow the microwave or fan to keep running, even when the door opens. Test each door switch for continuity with a multimeter, and replace any switch that fails. Next, the user control and display board may not be registering the Cancel button. If none of the control panel buttons respond correctly, this board is a likely cause. If some buttons work while others do not, the touchpad and control panel or touchpad may be defective. Less commonly, a failed relay or triac on the main control board can continue supplying power after the microwave is turned off. Enter your model number to find the exact replacement part for your Sanyo microwave. 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 a qualified technician should perform the repair if you are unfamiliar with that procedure.

01 - Sanyo Microwave 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 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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02 - Sanyo Microwave User Control and Display Board

The cancel or off button on the user control and display board may not be activating. To determine if the control and display board is defective, try pressing each of the buttons on the control panel. If none of the buttons are responding correctly, replace the user control and display board.

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Highly Likely

03 - Sanyo Microwave Touchpad and Control Panel

The cancel or off button on the control panel may not be activating when it's pressed. 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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Common

04 - Sanyo Microwave Touchpad

The cancel or off button on the touchpad may not be activating. To determine if the touchpad is 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.

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Common

05 - Sanyo Microwave Main Control Board

The main control board has relays that send power to several components to make the microwave work. If one or more of the relays or triacs short out, some of the components can keep running when the controls are turned off. (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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Common

06 - Sanyo Microwave Control Board

The control board has relays that send power to several components to make the microwave work. If one or more of the relays or triacs short out, some of the components can keep running when the controls are turned off. While you can often replace just the control board, some microwave models sell control panels as an assembly with both the touchpad and control board included.

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Uncommon But Possible

Frequently Asked Questions

Why won't my Sanyo microwave turn off?

Why does my Sanyo microwave fan keep running after I press Stop or Cancel?

How do I know whether the touchpad or control board is causing my microwave to keep running?

How do I test a Sanyo microwave door switch, and is it safe to replace?

How do I find the correct Sanyo microwave part for this repair?

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