How to Test and Change a Fuse on a Microwave

Jul 28, 2023, 18:21pm

The fuse is a safety element: if it is no longer powered, it will cut out and turn off the microwave.

If another part of the microwave is faulty, the fuse will also trip.

?Depending on the microwave, you may have more than one: at the power supply board or at the door closing contacts

A blown fuse is one of the most common reasons why your microwave might not be powering on. Fuses in microwaves are designed to protect the electrical components from power surges, and they will blow if they receive too much electricity. When this happens, the fuse needs to be replaced. Here’s a detailed guide on how to test and change a fuse on a microwave.

How to Test and Change a Fuse on a Microwave

Safety Notice: Always ensure your safety when dealing with electrical appliances. Disconnect the microwave from the power source before starting any work. If you’re unsure or uncomfortable about performing these steps, consider hiring a professional.

Tools You’ll Need:

  • Screwdriver set
  • Multimeter
  • New fuse compatible with your microwave model

Steps to Test and Change a Fuse on a Microwave:

1. Unplug the Microwave: Always disconnect your microwave from its power source before starting any repair work. This minimizes the risk of electric shock.

2. Remove the Microwave’s Outer Cover: Depending on the microwave model, you will need to unscrew and remove the outer casing. This will give you access to the internal components.

3. Locate the Fuse: The fuse is usually found on the back of the microwave. It is typically a small, cylindrical, glass or ceramic item with metal caps on both ends.

4. Remove the Fuse: Carefully remove the fuse from its holder. It’s generally held by clips and can be removed by gently pulling it out.

5. Test the Fuse: Set your multimeter to test continuity and touch a probe to each end of the fuse. A good fuse will show a low resistance reading, while a blown fuse will show no continuity or a high resistance reading.

6. Replace the Fuse: If your fuse is blown, replace it with a new one of the same type and rating. The rating details are usually printed on the fuse. Gently push the new fuse into the holder.

How to Test and Change a Fuse on a Microwave

7. Reassemble the Microwave: After the new fuse has been installed, put the cover back onto the microwave and replace the screws.

8. Test the Microwave: Finally, plug the microwave back into the power source and check to see if it powers on.

In conclusion, changing a microwave fuse can be a simple task, and it’s often the solution if your microwave isn’t powering on. However, a blown fuse can also be a sign of a larger issue, like a power surge or a malfunctioning component. If the new fuse blows again shortly after being replaced, it’s best to consult with a professional. Regularly maintaining your microwave and addressing issues promptly can extend the lifespan of the appliance and ensure it functions optimally.