9 Best Steps: How To Replace A Door Switch/Door interlock switch?

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How To Replace A Door Switch?.

I’ve realized I need to replace the door switches on my microwave. I understand that repairing microwaves can be hazardous, but I’m struggling to find clear instructions on How To Replace A Door Switch.

How to replace a door interlock switch?:

When you replace a door interlock switch, make sure the replacement switch is the same size. It should have the same or better electrical specifications: terminal configuration and current rating. As you remove the faulty switch, take note of which wire goes where.

Rely on the markings on your old switch to ensure the correct alignment for the switch. You cannot depend on location alone because your new switch may have a different arrangement. Be sure the new switch lines up properly with the actuating mechanism. Finally, use your ohmmeter to check and make sure the new switch is performing under the correct electrical specifications.

Replacing Microwave Door Switches – With a Buddy!!

What is Microwave door Interlock Switch/Door switch?

A microwave door switch or Microwave door Interlock Switch is like a traffic light for your microwave. It stops the microwave from working when the door is open.

9 Best Steps to replace a door interlock switch Or How To Replace A Door Switch?

Following are the 9 best steps to replace a door interlock switch:

Understand the Door Interlock Switch:

Before diving into the replacement process, it’s essential to Understand the Door Interlock Switch and why it’s important. Essentially, this switch ensures that the door of your appliance is securely closed before it can operate. It’s a safety feature designed to prevent accidents and damage to both the appliance and its surroundings.

Assessing the Situation:

Another step in replacing a door interlock switch is Assessing the Situation. If your appliance isn’t working properly, and you suspect the switch is the culprit, it’s time to take a closer look. Start by unplugging the appliance and locating the door interlock switch. Depending on the appliance, this switch might be found near the door latch or within the control panel.

Gathering the Tools:

Once you’ve located the switch, gather the necessary tools for the job. You’ll likely need a screwdriver (both Phillips and flathead), pliers, and possibly an ohmmeter for testing electrical continuity.

Safety First:

Before beginning any work, ensure your safety by disconnecting the appliance from its power source. This step is crucial to avoid any risk of electric shock while working on the switch.

Removing the Old Switch:

With the appliance safely disconnected, you can now begin removing the old switch. This might involve removing screws or clips holding the switch in place. Once the switch is accessible, carefully disconnect any wires attached to it, taking note of their positions for reinstallation.

Install the New Switch:

Once the old switch is removed, it’s time to Install the New Switch. Before connecting any wires, ensure the new switch is aligned correctly and securely in place. Use the markings on the old switch as a guide if needed.

Connecting Wires:

With the new switch in position, reconnect the wires according to the notes you made earlier. Take care to connect each wire to the corresponding terminal on the switch, ensuring a secure connection.

Testing the Switch:

Before reassembling the appliance, it’s crucial to test the new switch to ensure it’s functioning correctly. Use an ohmmeter to check for continuity, verifying that the switch opens and closes as expected when the door is opened and closed.

Reassembling the Appliance:

Once you’ve confirmed the switch is working correctly, it’s time to reassemble the appliance. Secure any screws or clips that were removed during the process, and ensure the door closes properly.

Final Checks:

Before plugging the appliance back in, perform a final visual inspection to ensure everything is in place and secure. Once you’re satisfied, plug the appliance back in and test it to confirm that the new switch is working as intended.


Replacing a door interlock switch or door switch might seem intimidating, but with the right approach, it’s a task that can be accomplished by DIY enthusiasts of all skill levels. By following the steps outlined in this guide and prioritizing safety at every stage, you can ensure your appliance is back up and running smoothly in no time.


Following are the Faq’s:

Is it necessary to replace a door switch if my appliance is still working, but the door doesn’t close properly?

Yes, it’s crucial to replace a faulty door switch even if the appliance seems to be functioning. A malfunctioning switch can compromise safety and may lead to further damage if left unattended.

Can I use any door switch as a replacement, or do I need to find an exact match?

It’s essential to find a replacement door switch that matches the specifications of the original one. This ensures compatibility and proper functionality within the appliance.

What should I do if I encounter difficulties aligning the new door switch during installation?

If you’re having trouble aligning the new door switch, double-check its orientation and position within the appliance. Refer to the markings on the old switch for guidance, and take your time to ensure proper alignment before securing it in place.

Do I need to recalibrate my appliance after replacing the door switch?

In most cases, there’s no need to recalibrate the appliance after replacing the door switch. However, it’s a good idea to test the appliance thoroughly after installation to ensure everything is functioning correctly. If you notice any issues, consult the manufacturer’s instructions for further guidance.

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