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Dacor Microwave turns on by itself

If your Dacor over-the-range microwave turns on by itself, first determine whether only the vent fan is running during stovetop cooking. A vent fan thermostat can turn the fan on automatically to cool the microwave and should shut it off once the unit cools. If the touchpad works correctly and the microwave is actually starting a cooking cycle, the main control board is the most likely cause and may need replacement. A malfunctioning interlock switch can also cause a microwave turning on by itself, so test the interlock switches with a multimeter and replace a failed switch. Next, inspect the switch holder behind the control panel. If it is damaged or misaligned, the door switches may not engage correctly. Less commonly, shorted circuits in the Dacor touchpad and control panel or the touchpad alone can send an unintended start signal. Enter your model number to find the exact replacement part for your specific Dacor microwave. Any repair that requires removing the outer cabinet must be handled carefully because the high-voltage capacitor stores a lethal charge even after the microwave is unplugged. It must be properly discharged before interior work, and this repair may require a qualified technician if you are not familiar with capacitor discharge procedures.

01 - Dacor 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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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 - Dacor 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 - Dacor 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 - Dacor 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 - Dacor 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.
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Less Common

Frequently Asked Questions

Why does my Dacor over-the-range microwave fan turn on by itself?
Why does my Dacor microwave turn on by itself when the door is closed?
Can a Dacor microwave touchpad cause the microwave to turn on by itself?
How do I find the correct Dacor microwave part for this repair?
Is it safe to repair a Dacor microwave that keeps turning on by itself?

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