Freezer shows EC and may stop cooling; often associated with power disturbances or internal PCB fault.

Safety: Disconnect power before opening any control covers.

Steps:

• 1. Power cycle: Unplug the freezer for at least 10 minutes to allow capacitors to discharge. Plug back in and check if EC reappears.
• 2. Inspect control housing: Remove the control box cover (top or rear). Look for signs of moisture, insect infestation, or burnt components on the PCB.
• 3. Check ground and neutral connections: Ensure all earth and neutral wires are firmly connected; loose connections can cause erratic PCB behavior.
• 4. Surge protection: If EC occurred after a storm or outage, consider using a surge protector or dedicated voltage stabilizer once the board is replaced.
• 5. Replace PCB: If EC persists after reset and no external wiring issues are found, replace the main control PCB with a Toshiba-approved part. Transfer any jumper settings or connectors exactly as on the original.

Warning: Do not attempt component-level repair on the PCB unless you are qualified in electronics; incorrect repair can create fire and shock hazards.