kitchenaid microwave not heating

Wondering why your Kitchenaid microwave not heating? Let’s find out together!

We can understand the inconvenience you are experiencing if your Kitchenaid microwave isn’t heating.

No worries, we are going to discuss easy solutions that’ll help you to fix your microwave heating issue easily at home, so make sure to follow the guide till the end.

There are many factors that’ll prevent the Kitchenaid microwave from heating the food some of them include a bad door switch, blown fuse, power surges, or faulty capacitor. You need to thoroughly inspect your Kitchenaid appliance to discover the true fault.

Now, let’s find out more about the not heating Kitchenaid microwave causes and fixes!

Why Is Kitchenaid Microwave Won’t Heat Food?

why my kitchenaid microwave not heating

Your Kitchenaid microwave will stop heating food due to different factors!

It’s evident that electronic appliances often get faulty and their components will need to be replaced in order to preserve the appliance in time.

Therefore, the reason your microwave isn’t heating up might be due to defective components or low power voltage! 

The following are the most frequent causes of not heating Kitchenaid microwave:

  • Faulty Microwave Door Switch
  • Faulty Magnetron
  • Low Electricity Voltage
  • Defective Microwave Capacitor
  • Blown Thermal Fuse
  • Damaged High Voltage Transformer
  • Faulty Microwave Timer
  • Defective Control Board

All the above are the most common reasons that’ll prevent the microwave from heating food.

Now that we have a clear understanding of the causes, by testing every component we can easily troubleshoot the appliance to find out the actual fault.

Kitchenaid Microwave Not Heating Food – Easy Fix Guide!

how fix kitchenaid microwave

We are now going further to discuss the effective troubleshooting solutions that’ll help you to fix the heating operation of your Kitchenaid microwave.

To avoid any other damage to your appliance, make sure to follow the methods precisely as discussed.

Let’s get started!

Solution #1 Check Microwave Door Switch

The Microwave Door is the first component you should check because a properly closed door signals other components to start operating and producing heat.

Your microwave door might not be closed because of an obstruction or because the interlock switch is defective!

check the door switch

Here is how to check the Kitchenaid microwave door & interlock switch:

  1. Unplug your microwave from the Power Outlet.
  2. Open the microwave door and push the door hook and check if they are working fine.
  3. If they are, then remove the turntable, rack, and support from the microwave.
  4. Unscrew the microwave screws from the cabinet and then they take the microwave out.
  5. Unscrew the top panel of the microwave using Philip’s screwdriver!
  6. Unscrew the left side panel to get access to the switch.
  7. Locate the door retaining tab and hold them back to release the switch from the holder.
  8. Note down the orientation of the wires and then disconnect all the wires from the switch.
  9. Test the switch via a Multimeter for continuity! 

If there is continuity then the door switch has no fault, move on to the next solution.

If the switch has no continuity, then set up a new door switch and connect the wires to it.

Note: Don’t forget to screw the left side and top panel back tightly!

Solution #2 Check The Control Settings

check the control setting

There are different options available for you to set the Power Level for the Kitchenaid microwave.

There is a chance that you have accidentally enabled an operational mode that is now preventing the Kitchenaid microwave from fulfilling its tasks!

  • There are 2 x operational modes – DEMO Mode & Control Lock Mode! 

Exiting DEMO Mode:

  1. Tap on TRY THE PRODUCT.
  2. Go down to ExPLORE.
  3. Find and select TOOLS.
  4. From there tap on INFO.
  5. Choose STORE DEMO MODE.
  6. Switch to OFF, and confirm with YES.

Turning OFF Control Lock:

Simply tap and hold the CANCEL for at least 4 seconds, until you hear a sound!

Whenever your Kitchenaid Microwave is free of any operational mods, put a ceramic dish with some food to test the heating.

In case the problem is persistent, keep reading!

Note: Any mode or control lock will be displayed on the microwave’s digital display!

Solution #3 Test High Voltage Diode

test high voltage diode

If you are not having any error or display lock enabled on your microwave, then possibly the High Voltage Diode in your microwave is defective.

This high voltage diode will convert electricity and make it compatible that’ll help the magnetron to heat the food. 

Your microwave’s high-voltage diode only needs to be tested now!

Alert: Don’t test the high voltage diode, if you are not professional because the diode has an electrical current even when the appliance is unplugged!
test voltage diode

Here is how to test the high-voltage diode in the microwave:

  1. First, make sure to unplug your microwave from Power Outlet.
  2. Unscrew the microwave top grill screws and take out the cover.
  3. Next, open the microwave door and keep that open.
  4. Unscrew the microwave control panel screws.
  5. Lift the panel up to detach it from the microwave.
  6. Next, unscrew the microwave’s inner access panel screws and remove its cover.
  7. Now, first, you need to release the charge from the capacitor to avoid any danger.
  8. To release the charge, use any screwdriver with an insulated handle.
  9. Place the screwdriver on the terminal but make sure not to contact the screws.
  10. Next, unscrew the diode screw and washer.
  11. Then, disconnect the diode from the capacitor.
  12. Use a Multimeter and test the diode for continuity. 

In case the high voltage diode has no continuity, then replace the diode with a new one and reassemble all the components back and close the microwave.

If there is continuity, install the component back into the appliance and read the next solution! 

Solution #4 Replace The Thermal Fuse

replace thermal fuse

If your Kitchenaid microwave still won’t heat up after attempting all of the aforementioned fixes, check the Thermal Fuse.

It’s possible that your microwave’s fuse blew from overheating, which is why when you’ve recently noticed that the Kitchenaid microwave drawer not heating.

Here is how to replace the Kitchenaid microwave thermal fuse:

  1. Unplug your appliance from the Power Breaker and take it out of the cabinet.
  2. Unscrew the rear back panel of your microwave to locate the Thermal Fuse.
  3. Use a flathead screwdriver and disconnect the wires from the fuse.
  4. Take out the fuse and test it via a Multimeter, if there is continuity, then it is working fine.
  5. If not, then set up a new fuse and connect the wires to it.
  6. Screw the back panel and place your microwave back in the cabinet to test it.
Tip: You can find thermal fuses online but be sure to check the models supported.

Solution #5 Inspect Microwave Magnetron

The Kitchenaid microwave Magnetron is the main component that’ll heat the food because it takes high voltage and uses that frequency to cook the food.

Every piece has a lifespan, the same as for magnetron and when it goes faulty, it won’t heat and is likely to blow a fuse!

inspect microwave megatron

Here is how to test the Magnetron in the Kitchenaid microwave:

  1. Unscrew the microwave mounting screws and take the microwave out of the cabinet.
  2. Remove the power, grounding wires, and conduit cable from the Junction Box.
  3. Unscrew the back of a thin metal retainer to fully remove the inverter Board Cover.
  4. Disconnect the right side panel to take it out.
  5. Unscrew the Magnetron Cover that you’ll see in the front
  6. Next, release the Side Retaining Tabs to release the Control Board
  7. Remove the retaining spring to lift up the microwave bulb.
  8. Then, unscrew the power supply board plate screws and place them aside.
  9. Also, disconnect the communication wire from the microwave user interface board.
  10. Next, detach the Ampere Actuator by turning it clockwise from the vent assembly.
  11. Unscrew the cavity vent assembly screws and then take that vent out.
  12. Disconnect the Wire Connector from the Magnetron.
  13. Unscrew the sensor from the magnetron.

When you’re ready, take out the magnetron and first test it via a Multimeter to check whether there will be continuity.

If the reading shows no continuity, replace the magnetron with a new one and reassemble all the components back in order as we have removed them.

Quick Recap:

Whenever your Kitchenaid microwave not heating, you’ll first need to make sure that the interlock switch has no fault and no mode is activated on the appliance.

The next step is to test the high-voltage diode, thermal fuse, and magnetron to discover and replace the faulty component.

For more Kitchenaid product troubleshooting guides, check out our blog!

Nicole B