How to Fix Kenwood Microwave Not Heating? Problem Solved

Discovering your Kenwood microwave not heating can be perplexing, especially when you rely on it for quick and efficient cooking.

As one of the most dependable appliances in your kitchen, a malfunctioning microwave can disrupt your daily routine, leaving you with cold meals and a puzzle to solve.

We will walk you through the common causes, offering step-by-step solutions.

The common reasons your Kenwood Microwave isn’t heating food include diode failure, incorrect user settings, door switch issues, magnetron malfunction, and control board failure.

Whether you’re a DIY enthusiast or seeking knowledge before calling a technician, you’ll find actionable and safe methods to troubleshoot and fix your Kenwood microwave heating problem.

How to Fix Kenwood Microwave Not Heating?

Kenwood Microwave Not Heating

Understanding why your Kenwood microwave won’t heat food properly is the first step in troubleshooting. Let’s dive into the common culprits and their fixes.

1. High Voltage Diode Failure

A failed high-voltage diode is a primary reason for your Kenwood microwave not heating but has power.

This crucial component generates the microwave’s heating function.

Easy Fix:

Firstly, prioritize safety by ensuring the microwave is unplugged. Dealing with high-voltage components is risky.

The capacitor must be discharged, potentially holding a lethal charge even when unplugged. This intricate and dangerous step is typically best handled by professionals.

After ensuring safety, locate the diode attached to the capacitor. Test the diode with a multimeter for one-way current flow.

If the diode shows equal resistance in both directions, it indicates a failure and needs replacement. In such cases, considering professional help is advisable.

2. Incorrect User Settings

Sometimes, the problem isn’t with the microwave itself but rather with incorrect user settings.

This can easily happen with the variety of functions and settings available on Kenwood microwaves.

Easy Fix:

First, ensure you’re familiar with the basic functions of your Kenwood microwave.

Check the user manual for different settings like defrost, reheat, and cook modes.

Incorrectly setting the power level or timer can result in the microwave running without heating the food.

Additionally, ensure the child lock feature isn’t activated, which can restrict certain functions.

If you’re unsure about the settings, try resetting the Kenwood microwave to its factory defaults as outlined in the manual.

Simple troubleshooting steps like these can often fix the Kenwood microwave not heating.

3. Door Switch Issues

Faulty door switches could be the reason your Kenwood microwave is malfunctioning.

These switches are engaged when the door is properly closed, signaling the microwave to operate.

Easy Fix:

Begin by accessing the switches. Remove the front panel and control panel to expose the door switches. Once accessible, use a multimeter to test each switch for continuity.

The resistance should be low when the door is closed and high when open. If a switch is too loose, tightening it might resolve the issue.

However, if the switch maintains high resistance despite being pressed, it indicates a need for replacement.

4. Magnetron Malfunction

A faulty magnetron is a common culprit behind a Kenwood microwave heating problem. The magnetron is integral in creating the microwaves that heat your food.

The malfunctioning magnetron is also a main culprit in the Frigidaire microwave heating problem.

Kenwood Microwave won't heat up

Easy Fix:

First, identify whether the magnetron is the problem. Common signs include the microwave not heating or emitting strange noises during operation.

Replacing a magnetron involves handling high-voltage components and is complex.

Therefore, it’s strongly recommended to seek professional assistance for this repair. This ensures both the effective resolution of the issue and your safety.

5. Main Control Board Malfunction

A less common but significant cause can be a failure in the main control board. The control board is the brain of your microwave, coordinating all functions.

If it malfunctions, it could disrupt the heating mechanism, even if the microwave appears to be running.

Easy Fix:

Troubleshooting a control board issue requires a bit more technical knowledge.

Start by inspecting the board for any visible signs of damage like burn marks or loose connections.

The control board might need repair or replacement if these issues are present.

However, diagnosing and repairing a control board requires professional expertise.

If you suspect a control board failure in your Kenwood microwave, consulting a qualified technician is the safest and most effective solution.

They can accurately diagnose the issue and determine whether the board can be repaired or replaced.

Check out the following blogs to repair the heating problem in other microwave brands:


In conclusion, facing a Kenwood microwave not heating up can seem daunting, but with this guide, you can identify and address the root causes.

From simple user setting errors to more complex technical glitches like magnetron or control board malfunctions, each problem has a solution.

Your safety is paramount, so approach each repair cautiously and seek professional assistance when needed.

Keep this guide handy, and you’ll be prepared to swiftly bring your Kenwood microwave back to its optimal performance, ensuring your culinary routines remain uninterrupted.

Steven Settles Author

Steven Settles is an ISCET-certified master in appliance repair. He has aced the National Appliance Service Technician Certification Exam, showcasing his exceptional diagnostic and repair skills. With an in-depth understanding of the latest repair technologies and a keen eye on evolving industry standards, Steven is a go-to expert for any appliance issue.

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