This high-voltage diode is designed for use within various makes and models of microwaves and is a genuine OEM part that converts alternating current (AC) into direct current (DC). If you notice your ...
This terminal block assembly is designed for use within various models of ranges and is sold as an individual OEM part without any other hardware included. Terminal blocks are responsible for receivin...
This flange nut is designed for use within various cooking appliances like ranges, microwaves and wall ovens. Flange nuts are typically used to evenly distribute pressure across its application surfac...
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David
November 30, 2022
Oven way-over heats at all temperatures settings. Tested both temperature thermostats at back of oven with multimeter and checked OK with room temperature reading of around 1080. I then replaced main PCB assembly. Tested oven and still temperature tops out no matter what setting. Should I have replaced thermostats even if they test good at room temperature? Any advice would help. Bought oven new 2019. Thank you
For model number NQ70M7770DG
Hello David, thank you for contacting us. We would recommend checking the wire connections of the thermostat and ensuring that the connections are good. If this does not help and the main PCB is good, the most likely solution to the problem is replacing the thermostats, part number PS4226406, and part number PS4226414. Customer service is always available to help you place an order if you are having trouble doing so. Good luck with your repair.
Removed control panel, discharged HV capacitor. Removed old diode, tested to confirm failure. Replaced part. Other than the removal of the panel swapping the part was almost as easy as replacing a light bulb.
The high voltage tired was shorted. I replaced it with a new one, but that did not solve the problem.
You can test the high voltage tired with a voltmeter and a 9 V battery. Search Search for it on YouTube.
You can also test the high voltage capacitor, the high-voltage transformer, and the magnetron with a multi met
... Read moreer. Search for the procedures on YouTube.
I tested all these high-voltage components with a low-voltage multi meter, and they all checked out OK (after replacing the diode). However the microwave still did not heat food.
When working on a microwave it is important to unplug it and also discharge the high voltage capacitor. The capacitor has a 10 megaohm resister to automatically discharge itself, but it may have failed – – so discharge it manually.
I removed the outer cover and exposed the inner workings. I watched a video on partselect.com to show how to remove and replace the Diode. I followed the instructions and it was very easy to replace.
Unfortunately, the diode was only part of the issue. I ended up replacing the High Voltage capacitor and Magnetron also. Those w
... Read moreere a little more complicated but still easy to do.
Now the Microwave works just like new! Cost me less than $100 for all parts.
