Wine cooler displays EC30 and may not cool; compressor may not start or may short-cycle.

Safety first: Disconnect power before accessing the compressor compartment. The compressor and surrounding components can be hot; allow time to cool.

Step 1 – Listen for compressor behavior

• When powered, listen at the rear or bottom of the unit.
• If you hear a repeated clicking every few minutes with no sustained humming, the start device may be failing.

Step 2 – Access compressor area

• Remove the rear lower access panel to expose the compressor, start device, and wiring.
• Inspect for burnt smells, discoloration, or melted plastic at the start relay.

Step 3 – Check start device

• With power OFF, gently pull the start device/overload assembly off the compressor terminals.
• Shake it lightly; if it rattles or pieces fall out, it is likely failed.
• Replace with the correct Sub‑Zero start device kit for your model.

Step 4 – Inspect wiring

• Check all wires to the compressor and start device for burns, loose connections, or brittle insulation.
• Repair or replace damaged wiring using proper connectors and heat‑resistant wire.

Step 5 – Compressor and board diagnosis

• If a new start device does not resolve EC30 and the compressor still will not run, the compressor windings or main control board relay may be defective.
• Testing compressor windings and running current requires a multimeter and clamp meter; this is best done by a qualified technician.

Warning: Do not attempt to open the sealed refrigeration system or add refrigerant yourself; this requires EPA‑certified service.