Customer Questions and Answers for Interlock Switch by Whirlpool

The Interlock Switch is an OEM part for Whirlpool microwaves. As a safety mechanism, it prevents inadvertent microwave radiation by cutting power without the door closed securely. 

Causes of a bad interlock switch involve insulation breakage from everyday wear, as well as impacts disturbing contact alignment. Over time and use, sensitivity diminishes.

Symptoms include:

• Inability to start cooking cycles without manually securing the door  
• Fault codes or error messages relating to door detection issues
• Microwave leakage if cycles can be triggered while the door is open

This OEM Whirlpool part is also compatible with some Maytag, KitchenAid, and Kenmore models.