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Customer Questions and Answers for Timer (3-Cycle) by Whirlpool

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Manufacturer Part
4.89 (64)
By: Whirlpool
Part Number: OEM18027078
Manufacturer Part Number: WP3976574

This 3-cycle mechanical timer controls cycle sequencing and duration in select Whirlpool appliances, restoring proper timing and automated cycle changes. It's a direct-replacement control for units with a worn or non-advancing timer. What it does:

  • Advances the appliance through its programmed cycles and times each cycle interval.
  • Directly controls cycle-related functions so the unit starts, changes, and ends cycles as intended.
  • Common symptom: appliance stays on one cycle, won't advance, or runs continuously.
  • Common symptom: cycles do not complete or the appliance fails to switch between functions.
What's included: One 3-cycle mechanical timer. Install notes:
  • Disconnect power (unplug or shut off breaker) before beginning any service.
  • Take a photo or label wiring before removing the old timer to ensure correct reconnection.
  • Handle the timer and connector pins carefully to avoid damage; use proper tools.
  • After installation, restore power and run a test cycle to ensure proper operation.

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Questions & Answers

For Whirlpool Timer (3-Cycle) (Part Number: OEM18027078)

Jen for Model Number LGC6646AQ1

Dryer timer does not advance. It stopped heating last last week. I removed the Thermal Fuse and Cycling Thermostat and had them tested. Cycling Thermostat was fine. Thermal Fuse was bad so I replaced it and the Gas Valve Coils, since they were also a possible culprit of timer not advancing. Thermal Fuse cured the heating problem. Nothing has fixed timer advancing issue. I even tried removing timer to have it tested, but was told they are unable to test for bad timers. Is my problem likely a bad timer? Is it possible to tell for sure if timer bad? I really don't want to spend $106 on a new timer unless I know it will fix problem. If I do order a new timer and it doesn't fix timer advancing problem can I return it for refund?

1 Answer

John, The most likely culprit would be a bad igniter, flame sensor or gas valve. You can check to make sure that you are getting power to the igniter by accessing the igniter and turn unit on. If the igniter does not glow then you will want to check to make sure that you are getting power to the igniter. Unplug the igniter and check across the terminals for 120 vac with unit running. If there is not 120 vac then then you will need to check from black to ground to make sure that you are getting 120 vac. If you are still not getting 120 vac then the problem would be in the motor switch. If you are getting 120 vac then you would want to check the High limit thermostat and thermal fuse for continuity. If there is no continuity replace the part. If there is continuity on both then the timer would be the issue.

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1 Answer

Hello Allcia. Based on the information you provided, it sounds like the motor 279827 is bad on the unit and will need to be replaced.

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1 Answer

Hello Allcia, The belt 341241 is off. The belt on a dryer doesn't just come off by itself. Normally the idler pulley WP691366 or the drum rollers 349241T,(two of these) have started resisting rotation to cause the belt failure. If the belt in on and not broken, and it's heating, the problem is most likely the motor run winding is open which will require the motor 279827 replacement to correct the issue.

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1 Answer

Hello Ravin! The model given, YLGR7467EQ3, does not pull in our systems. Can you double check this model number and also supply a serial number for further verification of the correct part needed? Thanks.

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