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Defrost Timer Timing Difference


  • Why is the time on a replacement defrost timer different from the original defrost timer?
  • Can you adjust the time on a defrost timer


Make sure that the correct part number was ordered. Contact a Factory Certified Parts Distributor to order parts.


Defrost timers have been redesigned throughout the years as product efficiency has improved and parts have been consolidated.

  • For example, an older 12-hour, 15-minute timer may be replaced by a newer 6-hour, 21-minute timer.
  • Sub-Zero does not recommend adjusting a mechanical defrost timer to change the duration of the defrost cycles.

For more operation information, see also:

Contact Factory Certified Service to schedule an appointment for repair.


Need further assistance? Contact Customer Care at 800.222.7820 or provide your information below and request a Customer Care representative contact you.

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