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Hotpoint Microwave turns on by itself

Is your Hotpoint microwave turning on by itself? First check whether only the vent fan is running while you cook on the stovetop. Most Hotpoint over-the-range microwaves have a vent fan thermostat that automatically starts the fan to cool the unit, then shuts it off after the microwave cools. If the microwave starts cooking or the fan runs at other times, the main control board is the most likely cause after confirming the touchpad works properly. A faulty interlock switch can also send the wrong signal, especially if the microwave turns on when the door opens or closes. Next, inspect the switch holder behind the control panel for damage or misalignment, since it may prevent the door switches from engaging correctly. Less common causes include intermittent contact between circuits in the touchpad and control panel, or a defective touchpad. Enter your Hotpoint microwave model number to find the exact replacement part for your 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 unplugging. Proper capacitor discharge is required before interior work, so use a qualified technician if you are not familiar with the procedure.

01 - Hotpoint Microwave Main Control Board

First, make sure that the touchpad is working properly. If the touchpad is working properly, the main control board is likely at fault. If the control board is defective, replace it.
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Shop all Hotpoint Microwave Main Control Board Parts
Top Solution

02 - Microwave cooling down during stovetop cooking

Most over-the-range microwaves have a vent fan thermostat that will turn the vent fan on automatically to keep the microwave from overheating. The fan will shut off after the microwave cools back down.
Highly Likely

03 - Hotpoint Microwave Interlock Switch

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

04 - Hotpoint 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, the switches may not be properly engaged which could cause the microwave to turn on by itself. 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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Common

05 - Hotpoint Microwave Touchpad and Control Panel

It’s possible that the touchpad and control panel button circuits are coming into contact with each other intermittently which could cause the microwave to turn on by itself. If this happens, the touchpad and control panel will need to be replaced.
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Less Common

06 - Hotpoint Microwave Touchpad

It’s possible that the touchpad button circuits are coming into contact with each other intermittently which could cause the microwave to turn on by itself. If this happens, the touchpad will need to be replaced.
Shop all Hotpoint Microwave Touchpad Parts
Less Common

Frequently Asked Questions

Why does my Hotpoint microwave turn on by itself when the door opens?
Why does my Hotpoint microwave fan turn on by itself?
How do I test a Hotpoint microwave interlock switch or switch holder?
Could the Hotpoint microwave touchpad or control panel cause it to turn on by itself?
How do I find the correct Hotpoint microwave replacement part?

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