Toshiba Microwave Won’t Turn Off? Why + Fix

It seems like you’re facing a bit of a pickle with your Toshiba microwave oven not turning off. This is a common issue that any company’s oven can deal with. In this detailed guide, we’ll dig deeper into the reasons why this issue can occur and provide you with some practical solutions to get that microwave back on track.

Technically, faulty control panels, stuck replay switches, defective door switches, and PCB issues are common causes that can lead a Toshiba microwave to not turn off. It requires manual inspection of faults to troubleshoot it as soon as possible.

Let’s jump right in!

Toshiba Microwave Won't Turn Off?

Why won’t the Toshiba microwave turn off?

There could be a few reasons why your Toshiba microwave won’t turn off. If this issue occurs in your unit, check each cause one by one to detect the problem source.

 Here are some common culprits we need to consider:

  • Control Panel Malfunction: A control panel malfunction refers to situations where the control panel of a microwave experiences errors or malfunctions, which can occur due to various factors. These issues can range from glitches in the control panel’s software or firmware to physical problems such as loose connections. The control panel may fail to register or execute the command to turn off the microwave when these malfunctions occur. This can lead to the microwave remaining active even when the user intends to switch it off.
  • Stuck Relay Switch: The relay switch plays a critical role in regulating the flow of electrical power to different components within the Toshiba microwave. It acts as a gatekeeper, controlling the on/off state of the microwave’s functions. However, there are instances where the relay switch can become stuck in the “on” position. When this happens, the microwave remains active regardless of the user’s intentions to power it down.
  • Defective Door Switch: The door switch is a crucial safety feature in your Toshiba microwave. Technically, the door switch of your unit is responsible for ensuring that the microwave operates only when the door is properly closed. It fails to accurately detect the closed position of the microwave door when the door switch is faulty or malfunctions. The microwave may remain operational even when the door is open or not completely closed as a result.
  • Electronic Control Board Issues: Practically, the electronic control board serves as the central processing unit of a microwave. However, there are instances where the electronic control board experiences issues or malfunctions. When these problems arise, they can interfere with the proper execution of commands, including the power-off command. The malfunctioning control board may fail to register the user’s instruction to turn off the microwave, causing it to continue running when it is supposed to be inactive. This disruption in the power-off command can occur due to hardware or software failures within the control board.

How to fix a Toshiba microwave that won’t turn off?

The temporary solution to turn off your microwave is unplugging it. But it is not a permanent solution. You have to repair the device to make it issue-free.

Below we’ve described general steps to fix a Toshiba microwave that won’t turn off:

  1. First of all, you should check whether this is due to a temporary glitch or not. Now, Start  by unplugging your microwave from the power source. Wait for about five minutes, and then plug it back in. This simple trick can often fix minor issues by resetting the microwave’s control system, just like giving it a refreshing power nap. If this doesn’t resolve the issue, test other parts.
  1. Next, you have to access the control panel. Take a closer look at the control panel of your microwave. Now, Look for any visible damage, loose connections, or buttons that are not responding. If you notice any problems, don’t hesitate to contact Toshiba’s customer support. They are the experts and can guide you further or arrange a repair if needed.
  1. If the control panel tested fine, Open the microwave door and find the door switches, usually near the latch mechanism. Make sure they are clean, properly aligned, and functioning correctly. If you see any broken or stuck switches, it may be time to replace them.
  1. If you possess a basic understanding of technical concepts, employing a multimeter to assess the functionality of a relay switch can be a rewarding endeavor, comparable to assuming the role of a detective unraveling a mystery. By employing this tool, you can delve into the intricate workings of the relay switch and uncover potential issues. However, it is essential to exercise caution, for if your investigation reveals that the relay switch is indeed defective, it is advisable to entrust the task of rectifying the problem to trained professionals who possess the expertise and experience in this domain. These experts possess the necessary skills to either repair the malfunctioning relay switch or procure a suitable replacement, ensuring a reliable and efficient resolution to the issue at hand.
  1. If none of the above solutions work, don’t worry! Toshiba’s customer support is there to help you. Reach out to them, and they will provide specific guidance tailored to your microwave model. They might even recommend a skilled service technician to assist you.

How to reset the Toshiba microwave?

If you’re encountering other minor issues with your Toshiba microwave, performing a reset might just do the trick. Here’s how you can reset it to give it a fresh start:

  1. Unplug the microwave from the power source.
  2. Let it sit there, unplugged, for around 5 minutes. This waiting period allows the internal components to discharge and reset themselves.
  3. After the 5 minutes are up, plug the microwave back into the power source.
  4. Now, don’t forget to set the clock and any other personalized settings that you had before the reset. It’s like giving your microwave a little reminder of who it belongs to.

Note: You should read the user manual given with your Toshiba microwave model to reset it. Some models have their own unique method to reset them.


Dealing with a Toshiba microwave that refuses to turn off can be frustrating, but fear not. By following the steps we discussed, you’ll be well-equipped to troubleshoot and fix the issue. Just remember to check the control panel, inspect the door switches, and test the relay switch if you’re up for the challenge. And if all else fails, don’t hesitate to reach out to Toshiba’s customer support.