Top-mount refrigerator: defrost timer and cold control check
On conventional top-mounts, a mechanical defrost timer and a cold control decide when the unit cools or defrosts. Advancing the timer by hand tells you in minutes whether the timer, the defrost parts or the cold control is at fault.
Single source ~45 min moderateBrands: Frigidaire, GE, Whirlpool, All top-mount
Before you start
- Unplug the unit before you remove panels or touch the wiring.
- Voltage checks at the heater are live tests: insulated probes, one hand.
- Never open the sealed system.
Diagnostic steps
Unlock all 5 steps with expected values
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