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Customer Questions and Answers for Thermal Fuse by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM21675663
Manufacturer Part Number: W11707984

This is a thermal safety fuse that opens the circuit if temperatures rise beyond a safe limit, protecting the appliance from overheating and preventing further damage. Replacing a failed fuse restores power to the affected circuit once the underlying cause is addressed.

  • Monitors temperature in a protected circuit and cuts power if unsafe heat is detected
  • Helps prevent overheating-related damage
  • Typical failure signs: no power/no operation, cycle won't start, shuts off mid-cycle after overheating event
  • Must not be bypassed; replace if open and investigate the root cause of overheating
What's included: 1 thermal fuse Installation notes:
  • Unplug appliance or disconnect power before service
  • Verify the fuse is open with a multimeter; replace only after correcting any airflow/overheating issues
  • Install in the same orientation and location as the original to ensure proper temperature sensing
  • Handle wiring carefully; transfer connectors one at a time to avoid miswiring

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Questions & Answers

For Whirlpool Thermal Fuse (Part Number: OEM21675663)

1 Answer

Hello Pol, This will have to be troubleshot with a test meter to determine what part or parts have been damaged. There can be more than one part damaged from this high voltage.

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1 Answer

Hello Joyce. You will need to uninstall the microwave and remove the outer cover off the unit. Once the outer cover is removed, you can access and replace the magnetron in the unit.

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1 Answer

Hello Larry. You will need to remove the outer cover off the microwave to access the fuse in the unit.

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1 Answer

Hello Annebell. You will need to disconnect the power and remove the outer cover off the unit. Now you can access and replace the fuse in the unit.

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1 Answer

Hello Rudolf. It is located in the control panel section of the unit. You will uninstall the microwave to access and replace the fuse in the unit.

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1 Answer

Antonio, You will want to check the magnetron on the unit. Unfortunately we would need to have the model number to be able to assist properly.

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Brennan for Model Number YWMH1162XVS-1

I have a 5 year old over-the-range microwave oven, model YWMH1162XVS-1. It stopped working on me yester day. The clock and keyboard still worked but when I tried to enter cook time or the +30 second quick start function it would state something like “open and close door”. I tried that several times for 15 minutes and it kept refusing to start. I disconnected it from the power a couple of times, waited a minute, and tried again. No luck. So then I went to Google and started researching and found that my door switches may be the culprit. With the unit still attached to the wall, I open the control board/keyboard and had little access to the switches. I took out the T10 screws and got the switch holders out. The top unit had 2 switches – looking in, the left switch had 3 terminals hidden behind the plastic bracket, and the right switch had 2 terminals and was much easier to access. I wanted to check the resistance and took them out of the bracket (support interlock top #8206419) and broke the clips. ARGH! The clips also forced the 3-terminal switch to separate in half but it appeared to go back together with no issues. I tested them on an auto-range ohm meter and they appeared to work. Both switched also appeared to pass the “click” test. So, I have a half open OTR microwave, a cranky wife, and a broken support interlock top #8206419. Where do I go now? What was the first thing I should of tried – the 20 amp ceramic cylinder fuse? Any advice would be much appreciated.

1 Answer

Hello Roxanne. Check all the wiring on the unit first. If all wiring is good, then it sounds like the board may be bad on the unit. The board is discontinued and no longer available.

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