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Customer Questions and Answers for Cycling Thermostat (Control), Single by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18022779
Manufacturer Part Number: WP31001192

This cycling thermostat regulates on/off heat cycles to maintain consistent operating temperature. Replacing a failed thermostat restores proper temperature control and helps protect the appliance from overheating or underheating during normal operation.

  • Senses internal temperature and opens/closes contacts to control the heating circuit
  • Helps prevent overheating; supports stable, repeatable heat cycling
  • Common failure symptoms include no heat, overheating/shutting off too soon, or longer-than-normal run times
  • Electrical component—failure may be intermittent before complete loss of function
What's included: 1 cycling/control thermostat Install notes:
  • Disconnect power (and gas supply, if applicable) before service
  • Note wire locations; transfer connectors one at a time to the new thermostat
  • Mount firmly against the mating surface for accurate temperature sensing
  • After installation, verify proper operation and temperature cycling

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Questions & Answers

For Whirlpool Cycling Thermostat (Control), Single (Part Number: OEM18022779)

1 Answer

Roger, The cycling thermostat WP31001192 has nothing to do with the dryer starting or running, it controls the temperatures in the drum. Based on your information and the checks you've made, this dryer should start run and heat properly ? You should start by checking and make sure that the power cord connections at the terminal block are good and tight. It is possible for the thermal fuse to circuit check OK, but not carry the return voltage to neutral source (middle terminal on block). You could TEMPORARILY attach the two wires from the fuse together, and test the dryer to start and run, DO NOT LEAVE FUSE BYPASSED, this will help verify the thermal fuse condition. If the issue still persists, you'll need to check for voltage out of the timer (120 VAC on the M terminal/orange wire) to the motor when the timer knob is pressed in to start the dryer. These are "LIVE" voltage tests, so be very careful.

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1 Answer

Roger, You will want to check the thermal fuse that is located on the blower housing for continuity. If there is no continuity then you would need to replace the thermal fuse. Also check the door switch with the door closed for continuity and if there is no continuity then the switch is bad and will need to be replaced.

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1 Answer

Hello Cypress Mill. Use a flat blade and release the clips under the front corners of the top panel and lift the top of the unit. Then remove the screws securing the front panel and unplug the door switch. Remove the front panel from the unit. Now you can access the cycle thermostat WP31001192 located on the blower wheel housing.

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1 Answer

Hi Craig. You need to replace the thermal fuse part # LA-1053. It opens if there is a either heater short or the vent clogged. Clean the entire vent system and the outside hood or this will open again. You can try to jump the door switch part # WP53-0148. White wire on common and the white wire to the motor. Thank You.

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1 Answer

Hello Daniel. It sounds like the venting system is clogged or kinked. You will need to check the vent and clean it out. Be sure and clean the vent pipe and the dryer air duct assembly. If the air flow is not good, the unit will retain moist air causing the clothes not to dry. Try running the unit with the vent unhooked from the back of the dryer and see if the dryer works properly. Hope this helps.

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