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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 Jeremy. Disconnect the power and remove the outer cover off the microwave to access the fuse in the unit. Thank you.

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1 Answer

Hello D.M.W., First, unplug the unit to prevent electrical shock. You access the fuse on model WMH53520CS6 by removing the two screws on the top edge of the microwave that thread down toward the floor and remove the air grille. You will then remove the single screw above the control board and lift and remove the control panel. The fuse is accessed through this opening.

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1 Answer

Cindy, You will want to pull the unit down from the cabinet and remove the outer panel. This will allow you to access the fuse.

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1 Answer

Hello Julie, As per the service manual: 1. Unplug microwave oven or disconnect power. 2. Open the microwave oven door. 3. Pull the two tabs and remove the center airflow screen from the top of the cabinet. 4. Remove the four indicated screws from the right panel cover, then pull the cover forward, and remove it. 5. Remove the screw from the right panel. To remove the line fuse: a) Unhook the two side tabs, and pull the right panel and relay control board forward as far as the wires will allow. b) Remove the line fuse from the fuse holder.

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1 Answer

Thomas, The fuse can be accessed by removing the control panel of the unit. You will want to remove the air grill at the top of the unit and then remove the single screw holding the control panel in place. The fuse can be accessed from the control panel area.

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