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

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Manufacturer Part
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)

1 Answer

Jo, You would attach the timer motor wire to terminal two (2) on the new defrost timer. Attach the jumper wire across terminals three(3) and four(4) Then attach the wire harness wires to terminals one(1) and three(3) as on the original defrost timer.

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1 Answer

Tim, The black lead wire that is connected to the timer would go on terminal labeled number 1 on the timer for your unit.

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1 Answer

Hello Kelly. The pigtail that is on the new timer will go to terminal number 1 for your unit.

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1 Answer

Hello Sal. You will need to place the black wire onto terminal number 2 of the defrost timer.

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1 Answer

Brent, The pigtail that is on the new timer will go to terminal number 1 for your unit.

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1 Answer

Hello Slawek, You should connect the black jumper lead to the number 1 terminal for proper operation on this unit.

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