Refrigerator shows E6 and may not cool; compressor may not start or may start and stop rapidly

Critical safety warning: Work on compressor and inverter circuits involves mains voltage. Unplug the appliance and, if you are not trained, do not attempt live tests. Refrigerant circuit work must be done by certified personnel only.

Steps to check E6:

• 1. Listen for compressor behavior: After plugging in, listen at the back. If the compressor clicks but does not run, or runs briefly then stops, a start or inverter issue is likely.
• 2. Inspect wiring: With power disconnected, remove the rear lower cover. Check the harness from the main board to the compressor or inverter module for burns, loose plugs, or rodent damage.
• 3. Check start relay/PTC (non-inverter models): Remove the relay from the compressor terminals and shake it gently; if it rattles or smells burnt, it may be faulty. Replacement is inexpensive and often resolves start issues.
• 4. Inverter module (if present): Visually inspect the inverter board for burnt components or cracked casing. Do not open sealed modules. If damaged, replacement is required.
• 5. Control board: If wiring and start components are good, the main PCB may not be sending the correct signal. This requires professional diagnosis and likely board replacement.

When to call a technician: If E6 persists after checking connections and replacing an obvious faulty relay, or if the compressor itself is suspected, contact a qualified refrigeration technician.