Sharp Control Output Failure / Relay Fault

Display works but compressor and fans do not run, interior warms up.

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

Failed compressor relay on main PCB, Faulty fan driver circuits, Loose harness connections from board to loads

Safety: Unplug the refrigerator before touching the control board or wiring.

Steps:

Check for error codes: If none are displayed, but no cooling occurs, suspect control output issues.
Inspect board: Look for burnt relay contacts or darkened areas near high-current components.
Reseat connectors: Ensure all harnesses from the board to compressor, fans, and sensors are firmly connected.
Replace main PCB: If visual damage is present or outputs remain inactive despite correct inputs, replace the Sharp-compatible main control board.

Professional Required 5/5

Main Control Board

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