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Customer Questions and Answers for Sensor Harness (Dryer Moisture Sensor) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18025710
Manufacturer Part Number: WP3406653

This sensor harness connects the dryer's moisture sensor bars to the main wiring, helping the control or timer read moisture levels so Auto Dry cycles can advance and deliver consistent, reliable drying performance.

  • Provides the electrical path between the moisture sensor bars and the control/timer
  • Enables the dryer to sense wet fabrics and adjust or advance Auto Dry cycles
  • A damaged or open harness can cause Auto Dry to not advance, run too long, or stop early
  • Contribute to inconsistent dry times or a "Sensing" indicator that behaves abnormally
What's included: One sensor wire harness Install notes:
  • Disconnect power before servicing
  • Access the sensor bars at the front bulkhead; note wire routing and clip locations
  • Transfer routing/clips from the old harness; connect to both sensor bars and the main harness plug, ensuring snug terminals and clear wire paths
  • Restore power and run an Auto Dry test; inspect/clean the sensor bars and check harness continuity

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Questions & Answers

For Whirlpool Sensor Harness (Dryer Moisture Sensor) (Part Number: OEM18025710)

Tim M for Model Number GGW900LW1

My dryer wont run. Here are the symptoms: I can turn the unit on (control on) and select a drying setting (automatic or manual cycles. The appropriate estimated time display changes normally. When I press HOLD TO START button, the unit clicks and the "sensing"status light stays on, but the drum doesnt turn nor does heating begin. In Test mode: all lights function, etc. When I open the door - there is a single beep and code 39 comes up on the display. I have replaced: the two moisture sensing bars, the moisture sensing harness, thermistor and thermal fuse. I still have the same symptoms and the same response in test mode. What is my next step? Tim

1 Answer

Mellie, You will want to check the thermal fuse on the blower housing for continuity. If there is continuity then test the door switch for continuity with the door closed. If there is no continuity then replace the door switch, if there is continuity and there is continuity on the thermal fuse then the motor will most likely be the cause for the issue.

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1 Answer

Laura, If you need the wiring for the thermistor then the sensor wiring harness WP3406653 would not be the correct part. This harness is for the moisture sensor. The thermistor part number is WP8577274. If you are needing the main harness it is no longer available.

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1 Answer

Ron, With the unit not starting you will want to test the thermal fuse on the blower housing for continuity and test the door switch. These would be the most likely causes of failure.

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Lorraine for Model Number MED9700SQ0

The automatic dry side does not work at all. the timed dry does work. that is problem one.. what part(s) do I need? Secondly, the noise eminating from the dryer sends us out of the house. I am going to assume it is the pulley wheel, idler? and as long as I am there replace the belt. do I have to take the drum out of the front as on the video or can I change the belt while the back is off and can see the pulley wheel and where things are to go? I am not tall and arms won't reach blindly as this is my first attempt

1 Answer

Hello Lorraine, The belt will have to be changed from the front of the unit. If you could re-post with an e-mail address, I can send you some illustrated instructions and troubleshooting instructions. Also, if the unit does not work on the automatic cycles but does on the timed dry cycles, the issue is going to be a clogged or crimped exhaust duct in the home. To prove this, disconnect the duct from the rear of the dryer and turn the unit on an automatic cycle. In 10 minutes you will see that the timer has advanced.

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1 Answer

Hello Michael, PF is a power failure. You will have to diagnose which component is faulty. You might want to make sure that both legs on the breaker box are turned on before you dig into the unit. You will be receiving an email with further troubleshooting help. Thanks!

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1 Answer

Ken, You will want to check the door switch on the unit. If the door switch has failed it could cause the light to fail as well. The part number for the door switch is WP8283288.

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1 Answer

Drew. The 2 loose wires will connect to the sensor bars that are on the filter housing. The bars can be seen on the inside front of the drum where the air would flow through.

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Barbara for Model Number GEW9260PWO

My Whirlpool duet dryer is heating too hot and is even burning hands when removing clothes. Blew the thermostat. I replaced the Thermostat and cleaned duct but is still running very hot. I tried to do the test to check the thermistor but did not give me a code reading but did beep. Is this still the thermistor or is this the exhaust sensor or are they the same thing? Removed dryer away from the exhaust hose in the back and is still running very hot.

1 Answer

Robert, With the unit not shutting off when it completes the cycle you will want to test the sensor to make sure that it is good and if it is then you would need to replace the control board as it would be the most likely cause of failure.

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