The Door Switch is a very simple device that monitors the opening and closing of the door, which ensures that the microwave operates safely. Your microwave most likely has three to four door switches. A multimeter will likely say that the voltage is not connected, but the diode should only conduct electricity in one direction while the leads are switched. If the diode seems to measure correctly with a multimeter, put a 9-volt battery in series with it. Inspect the microwave diode and if the diode is blown away, replace it. When the microwave diodes fails, you can likely see it visually blown. It’s recommended that you replace the diode to avoid potential damage to the magnetron or risk of fire or electrical shock. In this case, your microwave might have shorted out from overheating. If your microwave does not heat food, a defective high voltage diode may be the cause. There are a few reasons why your microwave might not be heating up: Faulty Diode If there is a gap between the microwave and the door, it may affect the function of the microwave to cook food correctly. Make sure the door is shut completely even if it seems like it is already closed. The microwave door may not be closed or shut completely. The timer is not a cooking tool - it’s a countdown monitor, and it only works when there’s nothing in the microwave. You hit the timer when you were supposed to hit the cook button. While microwaves are complicated appliances, there are some important things that you should know about before making a repair call: Only qualified professionals should tinker with Kenmore microwaves. You should never turn on an unplugged microwave to attempt any of the following fixes. IMPORTANT: Even when a microwave is unplugged, it contains deadly voltage. Kenmore Microwave Not Heating – Troubleshoot and Diagnosis A qualified technician can usually figure out which piece needs replacement and will do so safely, even if replacing the part requires opening the machine cavity. The most common reasons why a microwave is not heating up are a defective high voltage diode, the door switch, the magnetron or some other minor component. ![]() Your Kenmore microwave might not be heating up because of a couple of reasons. Many people assume that the microwave is broken when they first run into the problem, but there are a few things you can check out first before calling in an appliance repairman. When your microwave runs but doesn’t heat, it can be extremely frustrating. In this article, I’ll address the most common issues and give you some tips on how to troubleshoot the microwave oven. There are a number of reasons why a Kenmore Microwave Not Heating. Don’t be disappointed if your home microwave oven has been experiencing problems.
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