E16 displayed and ice build-up is excessive, or defrost cycle seems too frequent

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Corrupted defrost timing in control board, Faulty defrost sensor feedback, Main control board failure

Safety first: Unplug the freezer before accessing controls.

Steps:

Perform a hard reset by unplugging the unit for 5–10 minutes, then reconnecting.
Inspect and test the defrost sensor and thermostat as described for E4/E5; replace any faulty components.
If sensors and heater are good but E16 persists, the defrost algorithm in the main control board may be corrupted.
Replace the main control board if defrost behavior remains abnormal and the error code returns.

Hard 4/5

Main Control Board

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