Wine cooler displays EC08 and may not maintain set temperature; compressor or fans may not run as commanded.

Safety first: Turn off power at the breaker before inspecting electrical connections. Do not work on live circuits unless you are trained and equipped.

Step 1 – Verify dedicated circuit

• Confirm the wine cooler is on a dedicated circuit of the correct amperage as specified by Sub‑Zero.
• Avoid using extension cords or power strips; plug directly into a properly grounded outlet.

Step 2 – Check outlet voltage

• Using a multimeter (if experienced), verify that the outlet provides stable voltage (around 120 VAC in North America).
• If voltage is low or fluctuating, contact an electrician to correct the supply issue.

Step 3 – Inspect power connections at unit

• With power OFF, remove the access panel to the control board.
• Check the main power input connector for tightness and signs of overheating.
• Reseat the connector and ensure strain relief is properly installed on the power cord.

Step 4 – Control board replacement

• If EC08 persists with verified good supply voltage and connections, the internal low‑voltage power supply on the board is likely faulty.
• Replace the main control board with the correct Sub‑Zero part.

When to call a technician: If you are not comfortable testing voltage or handling control boards, schedule service with a qualified technician.