Your microwave could not be heating for various reasons. There are several parts connected to a microwave, when any of these parts stop supporting or functioning, it will hamper the entire heating process of your oven. However, there are some critical parts that you may have to inspect whether these are functioning properly.

If your Microwave Oven Isn’t Working, at ARS, the best appliance repair services in Toronto & GTA area, we have some of the common solutions related to the different parts of the microwave oven. If it has suddenly stopped heating perhaps, these may help you.


Parts to inspect when your microwave oven isn’t working:

1. Diode:

Also known as Microwave Diode, this part helps the A/C power of the transformer to convert to D/C. As a result, it has a capability to double the voltage to almost 5,000 volts. Inspect the Diode properly if this has burned down. If it is the case, then you may have to replace it through an experienced technician.

2. Microwave Door Switch:

Generally, various microwaves have three or four door switches. The door switch ensures that the door is closed properly while heating. If any of the three or four switches fails, your oven will not heat. You will have to use a multimeter to test which switch has stopped functioning properly and get the faulty one replaced.

3. Magnetron:

Magnetron is one of the essential parts of a microwave oven that uses high voltage to generate microwave frequency so that your oven can cook food. If the magnetron burns out, it will mostly likely neither heat nor cook. Get the part inspected by a skilled technician to understand if this is preventing your oven from heating food.

4. High Voltage Capacitor:

Capacitor and Diode both with the high voltage power to double the voltage and also to convert the transformer’s output to DC. If the capacitor is burned out, it would process heating. In order to check if this is causing issue, you would require a VOM meter with a capacitance testing feature. Make sure your microwave is unplugged and inspected by a technician as the electricity released is at such high level that may case electronic shock.

5. Thermal Fuse:

Your oven’s thermal fuse will cut off if the microwave gets overheated. In such scenarios, you will have to use a multimeter again to check the issue with your thermal fuse. You cannot reset or repair a thermal fuse; thus when it is damaged, you will have to replace it.

6. Thermo protector:

If your microwave gets overheated, thermo protector cuts off the power immediately. However, if the part trips, you will have to inspect it as your oven won’t heat or even start. If your thermo protector is giving you continuous tripping issues, you will have to replace it.

7. High Voltage Transformer:

Unlike high voltage capacitor, a transformer helps in balancing the power to transfer it to magnetron’s antenna. It is because microwave generates very high amount of voltage. If your transformer fails, it will give a burning smell. You will have to get it inspected by a technician and get it replaced if needed.

8. Main control board:

If your microwave oven has stopped heating food, it is likely that your main control board could have become defective. These have to be diagnosed properly. If all the other parts of your oven are working fine, then you have to replace your control board.

Also read the best tips to enhance the longevity of your microwave oven.

Make sure to keep a check on your oven and never leave it unattended. There is a high risk of electrical shocks if any part goes faulty. Thus, it would always be wise to ask a professional technician to look into the issue. Our experts at ARS, are skilled at their work and know the inspection process well. Call us anytime if your microwave oven isn’t working and we will be happy to assist you.