Display shows EC; refrigerator may not cool correctly or may run erratically.

Safety first: Unplug the refrigerator and wait several minutes before touching the control board. Avoid static discharge.

Steps to address EC:

• 1. Power reset: Disconnect power for 10 minutes, then restore. If EC returns, the board is likely faulty.
• 2. Inspect board: Remove the rear control cover and visually inspect the main control board for burnt spots, bulging capacitors, or corrosion.
• 3. Check for external shorts: Before replacing the board, inspect connected loads (fans, compressor relay, heaters) for obvious shorts that could have damaged the board.
• 4. Replace main control board: Transfer each connector one at a time from the old board to the new to avoid miswiring. Mount the new board securely and reinstall the cover.

Because this is an electronic repair, many homeowners choose professional service, especially if the unit is under warranty.