Freezer displays E10 and may not maintain set temperature; compressor may short-cycle.

Safety: Unplug the freezer before accessing the control board. Capacitors on the PCB can hold charge briefly after power-off.

Steps:

• Power reset: Disconnect power for at least 10 minutes to allow the control to fully reset. Restore power and observe if E10 returns.
• Inspect control housing: Remove the control panel or rear electronics cover to access the main PCB. Look for burn marks, swollen capacitors, or corrosion.
• Check connectors: Reseat all harness connectors to the PCB, ensuring firm contact. A poor connection can mimic a board fault.
• Verify sensor inputs: If other sensor-related codes are not present, but E10 persists, the board itself is likely at fault.
• Replace main PCB: Obtain the exact Sharp replacement board using the model and serial number. Transfer any jumper settings or wiring positions exactly as on the original. Mount the new board securely and reconnect all harnesses.

Final: Restore power, set the desired temperature, and monitor operation for 24 hours to confirm stable cooling and no recurrence of E10.