Choose Product
Identify Problem
03
Find Solutions
HomeRepair HelpMagic Chef Microwave RepairMagic Chef Microwave turns on by itself Repair

Magic Chef Microwave turns on by itself

If your Magic Chef microwave is turning on by itself, first determine whether the microwave is actually starting a cooking cycle or the vent fan is running. On an over-the-range microwave, the fan may turn on automatically during stovetop cooking when the vent fan thermostat senses heat, then shut off after the microwave cools. If the touchpad is working properly and the microwave turns on when the door opens or starts without a command, the main control board is the most likely cause and should be replaced. A faulty interlock switch can also cause a microwave to turn on by itself, so test the primary, secondary, and monitor switches with a multimeter. Next, inspect the switch holder behind the control panel for damage or misalignment, since it may prevent the door switches from engaging correctly. Less commonly, intermittent contact between circuits in the touchpad and control panel, or a defective touchpad, can cause this problem. Enter your Magic Chef microwave model number to find the exact replacement part. Any repair requiring the outer cabinet to be opened must be handled carefully because the high-voltage capacitor can store a lethal charge even when unplugged and must be properly discharged. Use a qualified technician if you are not familiar with capacitor discharge procedures.

01 - Magic Chef 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.
Enter model number to search for the required part specific to your product
Need help finding your model number?
Shop all Magic Chef 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 - Magic Chef 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.
Shop all Magic Chef Microwave Interlock Switch Parts
Common

04 - Magic Chef 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.
Shop all Magic Chef Microwave Switch Holder Parts
Common

05 - Magic Chef 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.
Shop all Magic Chef Microwave Touchpad and Control Panel Parts
Less Common

06 - Magic Chef 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 Magic Chef Microwave Touchpad Parts
Less Common

Frequently Asked Questions

Why does my Magic Chef microwave turn on by itself?
Why does my over-the-range microwave fan turn on by itself?
How do I test the door switches on a Magic Chef microwave?
Could the touchpad or control board cause a Magic Chef microwave to turn on by itself?
How do I find the correct replacement part for my Magic Chef microwave?

Shop by Magic Chef Microwave Parts

Magic Chef Microwave Adhesive Replacement Parts
Magic Chef Microwave Axle, Roller, Shaft, Wheel Replacement Parts
Magic Chef Microwave Bearing Replacement Parts
Magic Chef Microwave Blade Replacement Parts
Magic Chef Microwave Blower Wheel & Fan Blade Replacement Parts
Magic Chef Microwave Bracket & Flange Replacement Parts
Magic Chef Microwave Cap, Lid & Cover Replacement Parts
Magic Chef Microwave Capacitor Replacement Parts
Magic Chef Microwave Chassis Replacement Parts
Magic Chef Microwave Circuit Board & Timer Replacement Parts
Magic Chef Microwave Compressor & Sealed System Replacement Parts
Magic Chef Microwave Deflector & Chute Replacement Parts
Magic Chef Microwave Diode, Magnetron & Resistor Replacement Parts
Magic Chef Microwave Door Replacement Parts
Magic Chef Microwave Drawer Replacement Parts
Magic Chef Microwave Duct & Venting Replacement Parts
Magic Chef Microwave Fastener Replacement Parts
Magic Chef Microwave Filter Replacement Parts
Magic Chef Microwave Fuse, Thermal Fuse & Breaker Replacement Parts
Magic Chef Microwave Gas Burner & Control Valve Replacement Parts
Magic Chef Microwave Gasket & Seal Replacement Parts
Magic Chef Microwave Glass Tray, Coupler & Support Roller Replacement Parts
Magic Chef Microwave Grille & Kickplate Replacement Parts
Magic Chef Microwave Handle Replacement Parts
Magic Chef Microwave Heating Element Replacement Parts
Magic Chef Microwave Hinge Replacement Parts
Magic Chef Microwave Insulation Replacement Parts
Magic Chef Microwave Knob, Dial & Button Replacement Parts
Magic Chef Microwave Latch Replacement Parts
Magic Chef Microwave Lighting & Light Bulb Replacement Parts
Magic Chef Microwave Manuals, Care Guides & Literature Replacement Parts
Magic Chef Microwave Miscellaneous Replacement Parts

Shop by Popular Magic Chef Microwave Models

Magic Chef 9850 Microwave Parts
Magic Chef DM85K Microwave Parts
Magic Chef M40B-3 Microwave Parts
Magic Chef MC696W Microwave Parts
Magic Chef MCO165UB Microwave Parts
Magic Chef MCO165UW Microwave Parts
Magic Chef MCO2122ARB Microwave Parts
Magic Chef MCO2122ARB Microwave Parts
Magic Chef MODW1A Microwave Parts
Magic Chef MODW1V Microwave Parts
Magic Chef UMV1142AAB Microwave Parts
Magic Chef UMV1152BAQ Microwave Parts
Magic Chef UMV1152BAW Microwave Parts
Magic Chef UMV1152CAB Microwave Parts
Magic Chef UMV1152CAS Microwave Parts
Magic Chef UMV1152CAW Microwave Parts
View more
Repair Clinic
Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips!
Our Story

Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.

About Repair Clinic
Customer StoriesRepair Parts BrandsDIY Repair BlogIn the News
Click for the BBB Business Review of this Appliances - Major - Parts & Supplies in Canton MI
Quick Links
Shipping Information365 Day Return PolicyRetail Location & HoursContact UsTrack OrderReviewsRepair Clinic Pro
Social Media
Privacy PolicyDo Not Sell/Share My Personal InformationTerms & ConditionsSitemapGet 10% Off
© 2026 RepairClinic.com