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Customer Questions and Answers for Dryer Thermistor by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18022842
Manufacturer Part Number: WP31001590

Fix a dryer that won't heat or overheats with a new thermistor. This temperature sensor ensures accurate heating cycles. DIY repair in 30 minutes.

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Questions & Answers

For Whirlpool Dryer Thermistor (Part Number: OEM18022842)

1 Answer

Hello Jeff, and thank you for your question. If the blower housing, motor, ventilation, and ducts are all clear of lint, the most likely cause of failure would be the relay control WP53-4643. Unfortunately, this part has been discontinued by the manufacturer and is no longer available.

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1 Answer

Sean, If you can restart the dryer immediately, it would likely be a failed relay on the control board W10756689 and the board would need to be replaced. If you have to wait to restart the dryer, the motor WP2200376 is likely faulty.

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1 Answer

Ann, the main control W10756689 can be tested for voltage output to the motor by testing the grey wire at relay PS9 for 120VAC when a cycle is started. If there is not 120VAC, the main control has failed. If there is 120VAC, the dryer will need to be unplugged, then the thermal fuse WP40113801 will need to be tested for continuity, and if it doesn't have continuity, would need to be replaced. If there is continuity, the wires will need to be inspected for any breaks or loose wires, and if there are none, then the motor WP2200376 would be the issue.

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1 Answer

Andr, based on the information provided, the thermistor WP31001590 is reading outside of tolerance as it should read between 9k to 11k O at room temperature. Another thing that can be checked is ensuring that the vent hose, as well as the ventilation going from the wall to the outside of the house is checked and cleared of lint build up.

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1 Answer

Don,

This thermistor should have a resistance of 10K ohms of resistance at 77 degrees and will have a plus or minus 10 percent. It sounds like the thermistor may be the issue as it sounds like a low rating.

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1 Answer

Bradley,

If you were getting 9.49K ohms of resistance then this would be a good part.

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1 Answer

Hello Mike. The sensor bar wires goes directly to the control board. The thermistor should run with that reading. It sounds like the loose wires may have shorted that board out.

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1 Answer

Hello Mike. Thermistors read resistance, not continuity. Try resetting the dryer by unplugging it for about 20 minutes then plug it back in. If this does not work, then you may have shorted out the board on the unit.

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1 Answer

Russ,

Based on the information it sounds like the control board for the unit would the issue. The part number for the control board is W10756689.

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