Ignis Defrost Thermostat / Safety Cut-out Fault

Ignis freezer shows F4; defrost cycle may be disabled and frost accumulates.

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

Open defrost thermostat, Blown thermal fuse, Loose thermostat clip on evaporator, Wiring fault

Safety first: Unplug the freezer and allow ice to melt before testing.

Locate defrost thermostat: A small round or oval device clipped to the evaporator tubing.
Test continuity: When cold, it should show continuity. Replace the defrost thermostat or thermal fuse if open.

Medium 3/5

Defrost Thermostat

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