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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)

Joy for Model Number gew9200lw0 (Whirlpool Duet Dryer)

I replaced the heating element after testing. Dryer is heating but turns off/ends cycle resulting in wet clothing. Later on the dryer was stuck on sensing and wasn't working and I found out the thermal fuse blew so I replaced that. I cleaned out the lint screen, venting hose, inside the dryer as best I could. Now, I'm wondering if I should test/replace the Thermistor or the High Limit thermostat? I'm nervous that the motor is dying. I don't want to use several cycles to dry with few articles of clothing and make matters worse.

1 Answer

HI Joy. Thank you for all the information. The blower housing has a thermistor that senses the temperature to the control board. This is the part #WP8577274. Double check the outside vent cap/ hood assembly while you are at it to make sure the vent cap operates normally. Turn off the breaker,unplug the unit. make sure your dryer cord screws are tight on the terminal block. Thank you.

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1 Answer

Hello Sakvan. The F40 code is for lost communication between the main board and the motor board. Check and make sure all wiring connections are good and tight. If so, you will need to replace the electronic control board WPW10111616. Hope this helps.

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1 Answer

Hello Michele. Disconnect the power to the unit. To replace the thermister WP8577274, you will need to remove the toe panel of the machine. The thermister is located on top of the blower housing. You will disconnect the wires going to the thermister and remove the screws holding it in place. Reinstall in reverse order with the new thermister. Hope this helps.

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1 Answer

Hello Jarhead. The thermister read temperature. If it is showing 12K, the temperature of the room should be around 72-75°. The thermister is testing ok. Test the temperature of the dryer when running and see if it cycles on and off. It should go from 110° to 155°. If it goes above 170°, the high limit may be bad WP3404153. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. Hope this helps. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html

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1 Answer

It is located on the blower wheel housing assembly. You can test it with a multi-meter, it should read around 10,000 ohms at room temperature.

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