Microwave Turns On When Door Opens (How To Fix)

Microwave turns on when door opens. Within the realm of culinary appliances, the microwave has emerged as an indispensable instrument for contemporary cuisine. It’s a speedy and efficient way to heat up remains, defrost solidified food, and indeed cook entire suppers.

In any case, a bizarre and potentially dangerous phenomenon has confused users in later times: microwaves turning on when the door is opened. This article aims to investigate the reasons behind this mysterious event, potential risks, and ways to address the issue.

Microwave turns on when door opens

Microwave turns on when door opensMicrowave turns on when door opens

The Basics of Microwave Operation

Before diving into the mysterious behavior of microwaves turning on unexpectedly, it’s crucial to understand how these appliances operate. Microwaves use electromagnetic radiation in the shape of microwaves to produce heat by exciting water molecules in food. The process is controlled by a combination of a magnetron, a waveguide, and a control system, all housed inside the microwave’s chassis.

Microwave Safety Features

Microwaves are designed with several safety highlights to protect users from harm. One principal safety component is the interlock system, which ensures that the microwave cannot work unless the door is safely closed. Usually, this system consists of a number of switches that, subject to when a door opens or closes, get engaged or released.

Understanding the Problem

The basic standards of a microwave’s design and safety components are violated when the door is opened and the microwave turns on. There are other plausible reasons why this issue may arise:

  • Faulty Interlock Switches: One of the primary reasons for a microwave turning on unexpectedly is breaking down interlock switches. If these switches fail to engage or disengage legitimately when the door is opened or closed, it can result in the microwave proceeding to operate when the door is partially open.
  • Defective Control Board: The control board is the brain of the microwave, managing all its capacities. A broken control board could cause erratic behavior, including the microwave turning on suddenly. This issue may stem from electrical issues or manufacturing defects.
  • Electromagnetic Interference: The microwave’s control system may occasionally be disturbed by outside components, such as electromagnetic interference from adjacent electrical devices, which might result in unpredictable behavior.
  • Software Glitches: Some modern microwaves come equipped with software for extra features and user comfort. Software glitches or bugs may potentially cause unexpected behavior, including the microwave turning on without user input.

Risks and Safety Concerns

Microwave turns on when door opens Microwave turns on when door opens

The most critical concern associated with a microwave turning on when the door is opened is the potential for burns or wounds. The microwave’s insides can reach scalding temperatures during operation, posing a serious risk in case somebody is exposed to the heat when they are not expecting it.

Additionally, ceaseless operation with an open door can harm the appliance itself, leading to more extensive issues and possibly rendering the microwave unusable.

Addressing the Issue

In the event that your microwave activates when the door is opened, you should take immediate activity to settle the issue. Here are some actions you can take:

  • Safety First: If the microwave begins operating unexpectedly, prioritize safety. Immediately unplug the appliance to avoid any potential harm.
  • Inspect Interlock Switches: Check the interlock switches for any visible harm or misalignment. If you notice any issues, it may be necessary to replace the faulty switch(es).
  • Examine the Control Board: Inspect the control board for signs of damage, such as burned areas or free connections. The control board could require replacement or repair if it is broken.
  • Professional Assistance: If you’re dubious about how to analyze or fix the issue, seek the assistance of a qualified device repair specialist. They can identify the root cause and perform any vital repairs.


The mystery of microwaves turning on when the door opens may be a concerning issue that demands quick attention. Users should prioritize safety and take proactive steps to identify and address the issue to avoid potential wounds or damage to the appliance. As with any malfunctioning electrical device, it is recommended to seek proficient help to ensure a careful and secure resolution. Regular maintenance and convenient repairs are essential to keeping kitchen machines, including microwaves, in optimal working condition.

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