Why Won’t My Microwave Light Turn Off [The SURPRISING Truth]

Originally Created on: May 8, 2023 @ 9:03 am

Why won’t my microwave light turn off? The issue could be a faulty or damaged door latch or control panel. A working microwave is a great addition to any modern kitchen.

If you use it regularly, you probably rely on the internal light from time to time, especially in low-light conditions.

However, when the microwave light won’t turn off, it can be frustrating. Want to get back to loving your reliable microwave?

Read on to learn why your microwave light won’t turn off and more.

Also Read: Can You Plug A Microwave Into a Power Strip [+ 5 MAJOR Concerns]

Why Won’t My Microwave Light Turn Off?

When your microwave is working, the light inside the unit should turn on and when the microwave is off, the light should turn off.

In fact, it should do so when you close the microwave’s door. If the microwave lights do not turn off when you close the door, the reason could be a stuck button.

Normally, when you press a button on your microwave, you should hear a beep. So, if there is no beep, it’s a sign the button is probably stuck. Try to play with the button for a few seconds to see if the light will turn off.

Another reason why your microwave light is on is because the door latch is not working properly. Due to the defective door latch, the microwave will believe the door is still open thus keeping the light on.

Lastly, the problem could be a faulty or damaged control board.

Why Won’t My Microwave Turn Off When I Close the Door?

If your microwave keeps running even after closing the door and the stop button is unresponsive, the issue could be a faulty or damaged control board.

The control board is responsible for sending signals to various components in your microwave. 

So, if your microwave is not turning off when you close the door, then the control board is not sending signals.

Also, your microwave could be having a defective touchpad. Another reason is a bad interlock switch.

The electrical components under the control panel usually check the switch for continuity. If faulty or damaged, they can cause a host of electrical issues.

The Microwave Range Hood Light Won’t Turn On

If your microwave range hood light won’t turn on, then it could mean the bulb is burned out.

Since it’s visually difficult to determine if the bulb is burned out, we recommend using a multimeter to test the bulb for continuity. Alternatively, you can replace the bulb.

Still using the multimeter, check whether the light socket is defective. The multimeter will allow you to test the incoming power to the socket. If the socket has power and the light bulb is not working, then replace the light socket.

The light switch could also be defective. So, use the multimeter to test the light switch for continuity. If the light switch does not have any continuity, then replace the light switch.

The Microwave Light Doesn’t Come on When the Door Opens

Usually, when you open the microwave door, a light comes on. This light continues to stay on even while your food or beverage is warming up.

If you notice that the microwave light does not come on when you open the door, the reason could be a blown bulb.

To confirm that you’re indeed having problems with the bulb, we recommend using a multimeter. If the multimeter indicates the voltage connection is faulty, then test the control board.

But before that, replace the bulb with a new one. If you’re still experiencing issues with the light, test the light socket with a multimeter.

Why Does My Microwave Light Up When I Open the Door?

Every microwave comes with an interior light bulb that’s supposed to turn on when the microwave is in use and when the door is open. So, if the microwave lights up when you open the door, it’s part of the design.

The light is useful in low light conditions, and it allows the microwave user to see what’s cooking or warming up in the oven.

However, if the microwave’s fan and heating kick on and the turntable/tray starts spinning immediately when you open the door, then there is an issue.

It could be faulty or damaged sensors, internal software, or electronics. Therefore, you need to have a professional check your microwave.

Conclusion

When your microwave light won’t turn off, the solution is to either buy a new one or call in a professional.

The faulty or damaged interlock switch, control panel, and other components are complex and that is why you need a professional.

Yes, there are several DIY solutions online, but it’s not worth the risk.