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Customer Questions and Answers for Thermistor by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18040551
Manufacturer Part Number: WP8577274

The Thermistor is an OEM part for Whirlpool brand dryers. It is a temperature-sensing resistor that monitors air temperature changes during the drying cycle. The thermistor provides feedback to the control board on heating element performance and internal air condition. 

Symptoms of a failed thermistor include:

  • Inaccurate temperature readings and selections  
  • Improper or incomplete drying
  • Safety issues from overheating due to lack of feedback
  • Error codes displayed on the control panel

Causes can be related to normal wear and environmental exposure over time. Failure prevents the dryer from achieving optimal drying conditions.

This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.

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Questions & Answers

For Whirlpool Thermistor (Part Number: OEM18040551)

1 Answer

Hello Al, As per the tech sheet on your model, “E1” flashes if the thermistor is open. Be aware that the circuit in the control can be at fault since it interprets the information sent to it by the thermistor. So, if changing the thermistor does not correct the issue and the wiring is found in good condition, the control 8566150 is suspect.

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1 Answer

Asmir, The model number listed is not showing up as a valid model number. If this is on a dryer then the most likely cause for the F1 error code will be the control board for the unit.

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1 Answer

Hello Irma. You turn the drum by hand and see if it is binding up. As for the value of the dryer, if it is worth repair or not, we can not answer that. Sorry.

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1 Answer

Hello Irma. Make sure the drum is not binging up. If it is not, then you will need to replace the motor in the unit.

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1 Answer

Nick, When the thermal fuse is blowing continuously, the issue will come down to air flow. You will want to check the blower wheel to make sure that there is nothing like fabric sheets caught in the wheel. If this checks ok then you will want to check the venting to the outside of the home which would be the most likely cause for the thermal fuse to keep blowing.

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1 Answer

Hello Laurie. Cycle Control Unit (CCU) Problem. • Verify all connections to and from the CCU. Replace if needed.

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1 Answer

Eric, Based on this information the issue sounds more likely to be neither the start switch or the timer. This issue sounds more likely to be that there is a contact in the motor switch that may be welded and causing the issue.

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1 Answer

Lori, You will want to test the thermistor at the control board connection to make sure that there is proper resistance. The reason to do a the control board would be so that you are testing the wires as well. At 70 degrees the thermistor should read 11.5K to 13.5K ohms. At 80 it would be between 8.5K and 10.5K ohms. Also test the exhaust thermistor as it could be faulty as well. It is possible that the wiring harness could be bad also. If all checks ok then the issue will be in the control board.

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1 Answer

Hello Nancy. It sounds like the meter is not set right. You will need to check the setting on the meter. Thanks.

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1 Answer

Hello Ray. If the vent is good, then it sounds like the relay board is not cycling properly and you will need to replace the board WPW10111606 in the unit.

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