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Customer Questions and Answers for Oven Thermal Fuse by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18028221
Manufacturer Part Number: WP4451042

The Thermal Fuse is an OEM part for Whirlpool ovens. It is designed to monitor the oven's temperature and automatically cut off power to the heating elements if the temperature exceeds a certain threshold. It acts as a failsafe to prevent excessive heat buildup and potential damage to the oven or surrounding areas.

Causes of a faulty oven thermal fuse can include a power surge, overheating, or electrical component failure. These factors can result in the thermal fuse blowing; interrupting the power supply to the heating elements and preventing further operation of the oven.

Symptoms of a bad oven thermal fuse may include:

  • Oven not heating up at all
  • Error codes or error messages displayed on the oven's control panel
  • Oven appears to be powered off

This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.
For the 248F thermal fuse with the insulated female spade and plug order WP4456654.

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Questions & Answers

For Whirlpool Oven Thermal Fuse (Part Number: OEM18028221)

1 Answer

Hello Gina, There is a thermal fuse WP9759243 for the upper bake compartment and another just like it for the lower bake compartment. The one for the upper bake compartment is most likely open. These are located on the back of the unit under the outer-most panel.

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Mike for Model Number RBD275PDQ8

The accubake double oven was locked up after cleaning cycle! I replaced a AP3110028 thermo fuse because it was bad! When the power came back on it was in the cooling mode! My sister tried to cut off the cleaning and it went to E2 F2 E2 code! We shut the breaker and waited about twenty minutes! Turned on the power and the display went to PH and the clock was on the display! Then the clock went off in about 30 seconds! Then the E2 F2 E2 code came on!

1 Answer

Mike, The unit is not showing a F2 E2 error code but any of the error codes that start with F2 error would be an indication that there is a problem with the keypad. You will want to check the keypad connection for a firm connection. Press cancel and if the error code returns after 60 sec. replace the keypad, if not replace the control board.

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N. for Model Number Whirlpool RBD275PDB2

My oven shut off while in use. It is a double oven. There is no heat, no lights, no display for either oven. I have checked to make sure there isn't a breaker flipped off. I asked advice through your online chat and was told that it may be the thermal fuse. They said there may be two of them since it is a double oven. Do I need to replace both fuses? Can you tell me the location of them and perhaps we can test the fuses to make sure they're bad before I order them? Thanks in advance.

1 Answer

N., With the unit not having any power at all there is one thermal fuse that goes in between the control board and the L1 supply line that may have blown. You will want to check the continuity of the thermal fuse. This is a link type fuse and is located in the vent area of the oven near the terminal block. You can try to access this by disconnecting the power to the unit and removing the control panel and you would need to reach in to disconnect the fuse. Once the fuse is disconnected you would test the continuity of it and if there is no continuity then it would need to be replaced.

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1 Answer

Hello Kevin. From what you are describing it does sound like the control board part# 4448876 needs to be replaced. Unfortunately it has been discontinued and is no longer available.

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Norm for Model Number GBD277PDB7

I ordered this fuse as a replacement but I could not install it as one connector is different. I'm told by customer service that the part received is a direct replacement. However, the replacement part has one 1/4" female spade and one 3/16" female spade while the original has two 1/4" female spades, one of which is uninsulated. Other than the lack of insulation, the different size is not readily apparent when looking at the original in situ. I am wondering if the spade can safely be replaced or if the harness plug can be replaced. If the fuse spade is the one changed, does it make a difference which direction to place?

1 Answer

Hello Norm, The fuse with two 1/4 inch spade connectors is WPW10638608. This is the only one that should be used. The incorrect ones will not retro-fit. The difference is in the amperage. The direction does not matter with a fuse.

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1 Answer

Hello Norm, Once again, we have to apologize for the compatibility tool. Please disregard it as it is still in work and is not recognizing all of the model and/or part numbers. There are actually two styles of these fuses. One has two flat connectors and the other has a hook on one end. You would need to order the one needed as per the style in the unit originally. Thermal Fuse with Hook On one End & Flat Terminal On Other Use WP4456654. For Thermal Fuse W/Flat Term On Both Use WP4451042.

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1 Answer

Hello Mark, The ignitors will have to turn almost white hot to pull enough current to open the gas valve. It sounds as though the ignitors were getting weak which caused the gas smell. I would use a clamp on ampmeter TJCL1100 on one wire to the ignitor and make sure they are pulling from 3.6 to 3.9 amps of current. This holds true for both the bake and broil ignitors WP9782065. If the proper current draw is not there, the ignitors have broken down in resistance and will require replacement.

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1 Answer

CJ, Your best option is to order WP4456654, Although the part you ordered is "correct" for the brand and model. Being a "safety" device, you don't want to attempt to splice it into the harness or modify it in any way. It may have been modified on the production line at the time of manufacture.

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