Frigidaire Microwave Not Heating? Here’s the Solution

Frigidaire microwave not heating? Make sure that your microwave is properly connected to a power outlet. In several cases, the faulty power outlet is the main culprit or the microwave is not plugged in correctly. 

In previous posts, I discussed the best solution for the Frigidaire microwave not turning on and other common Frigidaire microwave problems. Similarly, in this article, I will walk you through the “not heating” problem and provide you with some effective solutions.

In most cases, a faulty door switch, diode, magnetron, or blown fuse is to blame for your microwave not heating food. Let’s dive in and explore each possible cause and solution to this problem one by one.

Why is my Frigidaire Microwave Not Heating Food?

The most common causes for Frigidaire microwave running but not heating food are:

  • The microwave not getting power.
  • Faulty microwave door switch.
  • Defective capacitor.
  • A blown fuse.
  • Faulty magnetron.
  • Tripped thermoprotector.
  • The diode is burned out.
  • Faulty main control board.

Now, let’s figure out how we can identify and fix any problems you might be having with your Frigidaire microwave.

Check Power Source

Let’s start with the basics: if your microwave isn’t heating, the first thing to check is the power source. Firstly, check if your microwave is plugged in properly and make sure that the power outlet is not faulty. You can try using another power outlet and see if your microwave starts working.

Frigidaire Microwave Faulty Door Switch

When you close the microwave door, the door switch activates and allows your microwave to start and heat your food. If your door switch fails, you will be unable to heat your food in the microwave.

If you have a doubt, you can check your door switch with the help of a multimeter. Frigidaire microwave has multiple door switches and if any of them are not working, you have to replace them.

However, it is not recommended to replace your microwave’s door switch on your own. Microwaves can store heavy amounts of electric current and they are dangerous even when turned off. So, it is best to contact a professional electrician/technician.

Frigidaire Microwave Capacitor Not Working

A high-voltage capacitor and diode in a microwave doubles the output voltage by converting the output to DC. If your microwave’s capacitor is not working, it will not heat your food. 

You can use a VOM meter to check the capacitor of your microwave. If it is faulty, you can get it repaired or replaced by contacting the Frigidaire service center or a professional technician.

Frigidaire Microwave Blown Fuse

Sometimes Frigidaire Microwave keeps blowing fuse because of any internal fault or power fluctuation. As a result, Frigidaire microwave stops heating the food. If you want to confirm whether your microwave is not heating food due to a blown fuse, you can check the fuse using a multimeter.

If the fuse in your microwave does not have continuity, it needs to be replaced. For this purpose, you can contact Frigidaire customer support or a qualified technician in your area.

frigidaire microwave-not heating check with multimeter

Frigidaire Microwave Faulty Magnetron

Magnetron is one of the main components a microwave has. It is responsible for generating electromagnetic waves. If the magnetron fails, the microwave also stops working and heating.

Several users report that their Frigidaire microwave is running but not heating food. In these types of cases, the main cause of the problem is a faulty magnetron.

If the magnetron of your microwave is burned out, you will need to replace it in order to get it working again. As I mentioned above, a microwave can store large amounts of electricity, so it is not advised to replace the magnetron on your own.

Tripped Thermoprotector

It is also possible that your Frigidaire microwave’s Thermo protector has tripped, and that’s why your microwave has stopped working.

This usually happens when your microwave gets overheated. The thermoprotector automatically cuts the power of an overheated microwave.

In this case, you have to confirm if the thermo protector is faulty by checking it through a multimeter. If it is faulty, you can get it replaced by a Frigidaire service center or a licensed technician.

The Frigidaire Microwave Diode is Burned Out

The microwave diode is responsible for providing the required voltage for microwave operation and heating. If the diode of your microwave is faulty, it will not receive the necessary voltage to heat your food.

The good news is that the microwave diode can be replaced. However, you should contact a qualified person to have it replaced.

Defective Main Control Board

As the name indicates, the main control board controls all functions of a microwave. If the main control board fails, your microwave will not be able to do anything.

However, the failure of the microwave’s main control board is not common and happens rarely. If your microwave is too old, its main control board is more likely to be malfunctioned. 

It is important to check all other components of your Frigidaire microwave before checking the main control board. After making sure that all other components are working perfectly, After ensuring the proper functionality of all other components, you can proceed with the replacement of your main control board.

Wrap Up

If your frigidaire microwave is not heating food, you should first ensure that it is correctly plugged in and getting enough power from the wall socket. Secondly, you should check if its door is getting locked properly and if its door switch is not faulty.

Then, you should check its components like magnetron, diode, thermo protector, capacitor, or main control board with the help of a multimeter. After finding the cause of this problem, you may replace the defective component by contacting the Frigidaire service center or any qualified technician.

Frequently Asked Questions

Why isn’t my Frigidaire microwave heating up?

There might be a problem with your microwave’s magnetron, diode, capacitor, or door switch. To resolve this issue, you should contact a professional technician and get your microwave repaired.

Why is my Frigidaire microwave lighting up but not heating?

There might be a problem with your microwave’s magnetron. You can fix this issue by replacing the magnetron of your microwave. For this purpose, you can contact the Frigidaire service center.

How much does it cost to replace a magnetron in a microwave?

Because the magnetron is the main component of a microwave, replacing it can cost between $100-$200 on average.

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