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Customer Questions and Answers for Timer, Defrost (6 Hr.) by Whirlpool

4.89 (64)
By: Whirlpool
Part Number: OEM18028053
Manufacturer Part Number: WP4391974

Defrost timer that advances the refrigerator's defrost cycle at roughly six-hour intervals to help prevent excessive frost buildup and keep cooling consistent. Replaces a failed timer to restore regular defrost scheduling. What it does:

  • Advances the defrost cycle so the heater can melt frost from the evaporator on a timed schedule.
  • Helps prevent heavy ice buildup that can reduce airflow and cooling performance.
  • Common symptoms of a failing timer: excessive frost or ice accumulation, compressor running constantly, or inconsistent temperatures.
  • Works with mechanical defrost systems to alternate between cooling and defrost intervals.
What's included: One defrost timer. Install notes:
  • Disconnect power to the appliance before servicing to avoid electrical shock.
  • Handle connectors and wiring carefully; ensure all terminals are fully seated.
  • Mounting hardware and connector types can vary by model—retain original fasteners and note wiring positions before removal.

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Questions & Answers

For Whirlpool Timer, Defrost (6 Hr.) (Part Number: OEM18028053)

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Answer

Hello John, The instructions are in the attachment. As per them, the present wiring diagram will have to be referenced to wire this part correctly. It should be either on the back of the unit or on a sheet usually behind the kick panel. It looks like you will need the neutral wire, (usually white), to the number 3 terminal. The loose lead on the replacement timer will go on terminal 1. The lead from the temperature control (sometimes yellow) will now attach to the number 1 terminal. The wire that leads back to the compressor (sometimes blue) goes to terminal number 4 and the lead that goes to the defrost thermostat (sometimes brown) will go to the number 2 terminal. I couldn't find the wiring diagram for your unit so you need to find the wiring diagram if the wire colors are different.

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Answered by AppliancePartsPros.com   |   Monday, August 13, 2012

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