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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: OEM18042057
Manufacturer Part Number: WP9759243

The Upper Oven Thermal Fuse is an OEM part compatible with Whirlpool double wall ovens. Located near the upper oven heating element, this safety device protects the upper oven cavity from excessive heat rises. If temperatures get too high, the fuse automatically cuts power to prevent overheating.

Symptoms of a blown upper oven thermal fuse include:

  • The upper oven failing to heat or losing total heating function
  • Burning smells emanating from the upper oven cavity
  • Safety shutdown errors related to over-temperature conditions

Common causes are airflow restriction trapping heat or faulty wiring allowing overheating. Natural aging also deteriorates fuses over extended use cycles.

Compatible brands include KitchenAid, Jenn-Air and some Kenmore wall oven models.

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Questions & Answers

For Whirlpool Thermal Fuse (Part Number: OEM18042057)

1 Answer

Trisha, The best way to test this is at the control board. You will want to check for 120 vac at the p16 connector between pins 5 and 7 for 120 vac and if there is power there then test from the p16 pins 2 to 3 for 12 to 24 vac. If there is no power at this point then transformer is bad. If there is power at this point then the control board is faulty. If there is no power at pins 5 to 7 then the control board is faulty.

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1 Answer

Eric, With the unit heating, the issue would not be with the thermal overload or fuse. If either of these were bad then it would not heat at all. The most likely cause for the issue would be with the control board or wiring between the control board and oven sensor.

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1 Answer

Diane, You will want to check the oven sensor on the unit to make sure that the sensor is good. The resistance of the sensor should be 1080 ohms at 70 degrees and you would add 2 ohms for every degree higher. If the resistance is off then the sensor would need to be replaced.

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1 Answer

Hello Larry, You will first remove the screws that hold the unit to the cabinet. These are located inside the door. Once removed, you can carefully use one of the doors to get the unit wiggled back and forth far enough to grasp the sides for unit removal.

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1 Answer

Hello Jason. You need to look for a damaged switch and repair any wiring if it got damaged as well.

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1 Answer

Hello Garland. Disconnect the power and pull out the oven and remove the back access panel. Now you can access and replace the thermal overload on the unit.

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1 Answer

Gordon, If the issue with the unit is just the upper oven broil not working then the thermal shutoff will not be the issue. If both bake and broil are not working then test the thermal overload for continuity. If there is no continuity then replace the thermal overload WP9759243. If the thermal overload is good then the issue will be in the control board WPW10438750.

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1 Answer

Hello Jim. Yes, the keypad will need to be ordered and replaced on the unit. The error is for a bad keypad.

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Leslie for Model Number RBD305 PDQ14

Hi I wasn't even using oven when I heard it beep a series of times and walked out to find the display blank. The buttons all still beep when touched and interior light works but the elements don't turn on when I push bake and start. If I reset the breaker the display comes on for a few seconds then goes right back off. Also says PF and locks in this brief few seconds its on and sounds like it's running. Any input would be appreciated ,thank you for your time.

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