Display shows E4 and freezer may shut down or run erratically.

Safety First: Disconnect power before accessing the control board.

E4 typically indicates an internal fault in the electronic control.

• Step 1 – Power reset: Unplug the freezer for at least 10 minutes to fully discharge the control. Restore power and see if E4 returns.
• Step 2 – Check supply voltage: Verify the outlet provides stable voltage within the specified range (usually 108–132 VAC). Avoid using undersized extension cords.
• Step 3 – Inspect control board: Access the control housing and visually inspect the board for burnt components, bulged capacitors, or corrosion.
• Step 4 – Replace control board: If E4 persists after reset and no external wiring faults are found, replace the electronic control board with the correct Frigidaire part number.

Because this involves line voltage and delicate electronics, many homeowners prefer to have a technician perform the replacement.