How to Change the Door Security of a Microwave

Jul 29, 2023, 11:18am

The door safety of a microwave is composed of three switches, activated when the door is closed. Hooks press on it when the door closes.

To ensure safety and prevent waves from leaving the microwave cavity, these switches check that the door is closed properly. If they are not pressed and you try to start a program, the microwave will not start and will wait for you to close the door.

The main dysfunction of this security is linked to the state of the switches.

If they fail, your microwave may turn on, but not start a heating program.

The safety is located behind the control panel, just behind the slots where the door hooks pass.

Microwaves are a common kitchen appliance that we use almost every day. Their ability to heat our food quickly and efficiently is a great convenience, but it also brings safety concerns, primarily due to the use of electromagnetic radiation. One critical part of a microwave’s safety system is its door security, which ensures that the appliance does not operate when the door is open. However, there may be occasions when you need to change the door security of a microwave, for reasons like a malfunctioning door switch or worn out door seals. Here’s a step-by-step guide on how to do it.

How to Change the Door Security of a Microwave


Before we dive into the process, it’s important to note that working with electrical appliances can be hazardous. Please ensure you have some experience or knowledge in handling such appliances before attempting these steps. If not, it’s recommended to hire a professional for the task.

Tools You May Need:

  1. A Screwdriver set
  2. Multimeter
  3. Replacement door switches (if necessary)
  4. Replacement door seal (if necessary)

Step-by-Step Procedure

1. Unplug the Microwave

Before you begin any work on the microwave, ensure it is unplugged from the wall socket. This eliminates any chance of electrical shocks during the process.

2. Remove the Microwave’s Outer Cover

This is usually held in place by screws on the back or side of the microwave. Unscrew these and lift off the outer cover carefully. Keep the screws in a safe place.

3. Locate the Door Switches

These are usually located behind the control panel. You might have to remove a few more screws to get access to the control panel. Once you’ve located the switches, identify if any of them are faulty. This is usually done using a multimeter to check the continuity of the switches when the door is open and closed.

4. Replace the Faulty Door Switches

If any of the switches are faulty, they will need to be replaced. Unplug the wires connected to the faulty switch, remove the switch, and replace it with a new one. Be sure to reconnect the wires correctly.

5. Check the Door Seal

The door seal is crucial for preventing microwave radiation from escaping when the microwave is in use. Inspect it for any wear and tear. If it looks damaged or worn out, it should be replaced. To do this, gently pry off the old seal with a screwdriver and press the new one into place.

How to Change the Door Security of a Microwave

6. Reassemble the Microwave

Once you’ve replaced the faulty components, it’s time to reassemble the microwave. Replace the control panel if you removed it, then put the outer cover back on, making sure to replace all the screws.

7. Test the Microwave

Finally, plug the microwave back into the wall socket and test it. When the door is open, the microwave should not operate, and it should start to function once the door is securely closed.

Remember, safety is of utmost importance. Never operate a microwave with a faulty door or if the door does not close properly. It is always a good idea to hire a professional if you are unsure about handling electrical appliances.

Microwaves are designed to ensure user safety, and the door security mechanism is an essential part of that design. Understanding how to maintain and replace these components when necessary can help you prolong the life of your appliance while also ensuring your kitchen remains a safe place.