Freezer Defrost Timer

Cause:

  • Bad defrost timer causing clicking to be heard with grille in place.

Topics:

  • Defrost Timer Operation
  • What does a Defrost Timer do?
  • Defrost Timer Clicking
  • Where are defrost timers used or located?
  • Is there a separate defrost timer for the refrigerator and freezer?
  • Freezer not defrosting

Answer:

The Defrost Timer advances the freezer system into and out of the defrost cycle.

  • Defrost Timers are not used on refrigerators, only freezers.
  • Depending on unit configuration the timer advances into the defrost cycle after the compressor accumulates a specified amount of run time.
    • Example: After the compressor runs for 6 hours the unit enters defrost for 21 minutes.
  • As the timer advances through different cycles it may make clicking noises.
    • These noises should not be heard when the grille is in place.
    • If the timer can be heard with the grill in place service should inspect the timer.
  • The Defrost Timer is usually located near the condenser.
  • Units with electric controls (600, 700, BI, 648PRO, NGI, UC) do not use a defrost timer, instead defrost cycles are controlled by the control board.

If these steps do not resolve the issue, no further troubleshooting advice is available. Contact Factory Certified Service to schedule an appointment for repair.

Thank you for your request. A Customer Care representative will contact you.

An error occurred. We were unable to submit your request.

Related Questions

We're standing by with answers

Whether you're shopping for appliances or have questions about those you already own, we've got the resources you need. Talk directly to a customer care expert at the Sub-Zero, Wolf, and Cove service center, or connect with an appliance consultant at an official showroom near you. Get quick answers online, or reach a certified service provider or installer. And much more.

Call us at (800) 222-7820

Customer Care and Support