How to Change the Fan of a Microwave

Jul 29, 2023, 11:23am

A microwave’s fan cools the inside of the appliance to prevent components from overheating. The fan is associated with a motor that turns it.

It is possible that the fan is broken, cracked or that the motor no longer works.

This module can cause the following fault symptoms:

  • The microwave makes noise: the fan can rub another room if it is off-axis.
  • The microwave stops during use: the fan no longer cools the system and creates overheating.

The fan is located at the back of the device, behind the magnetron. To access it, you have to remove the cover.

A microwave oven is one of the most used appliances in the modern kitchen. Besides heating and cooking food, it has a ventilation system that eliminates odors and fumes while cooking. The key component of this system is the fan, also known as the exhaust fan. Over time, with constant use, the fan may break down or not work as efficiently, making it necessary to replace it. This article will guide you through the process of changing a microwave’s fan.

How to Change the Fan of a Microwave


Please remember that a microwave is an electrical appliance, and safety should be your utmost priority. Always unplug the microwave before starting any repairs. If you’re not comfortable with DIY repairs or if your microwave is under warranty, seek help from a professional or authorized service center.

Tools You Will Need:

  1. Screwdriver (both Phillips-head and flat-head)
  2. A new microwave fan
  3. Multimeter (optional)

Step-by-Step Procedure

1. Unplug the Microwave

Before starting, ensure the microwave is unplugged from the power source. This minimizes the risk of electrical shock.

2. Remove the Microwave’s Outer Casing

Remove the screws from the back and sides of the microwave that secure the outer casing. Once the screws are removed, slide or lift off the casing. Make sure to keep the screws in a safe place for reassembly.

3. Locate the Fan

Once you’ve removed the casing, you should see the fan. It’s generally located at the back or side of the microwave.

4. Check the Fan

If the fan is not working or is making noise, it might need replacement. However, it’s a good idea to check the continuity of the fan motor using a multimeter. If the motor has continuity, it is functional, and the problem might lie elsewhere. If it doesn’t, it’s time for a replacement.

5. Remove the Old Fan

Remove the screws holding the fan in place. Be careful not to damage any nearby components. Once the screws are removed, carefully take out the fan. There should be two wires attached to it. Disconnect these wires, keeping in mind or noting down their positions for reinstallation.

6. Install the New Fan

Connect the wires to the new fan as they were connected to the old one. Make sure the connections are secure. Now, put the new fan in the place where the old one was located. Secure it using the screws you removed earlier.

How to Change the Fan of a Microwave

7. Reassemble the Microwave

Put the outer casing back on the microwave and replace all the screws you removed earlier. Make sure everything fits together properly.

8. Test the New Fan

Plug in the microwave and turn it on. You should now hear the fan running smoothly. If not, or if the microwave does not operate correctly, it’s advisable to consult a professional.

By replacing the fan of a microwave, you can extend the lifespan of your appliance and improve its efficiency. Remember, if at any point you’re unsure about any steps, don’t hesitate to seek professional help. Safety should always be your primary concern when dealing with electrical appliances.