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Freezer Defrost Timer

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

Cause:

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

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.

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