Indoor unit stops and displays E1; unit may not respond to remote; sometimes restarts briefly then shuts down again.

Safety first: Turn OFF the air conditioner at the breaker and wait at least 5 minutes before touching the outdoor unit. Do not open any refrigerant lines yourself—refrigerant work must be done by a licensed technician.

• Step 1 – Power reset: Turn the indoor unit OFF with the remote, then switch OFF the dedicated breaker for 5–10 minutes. Turn it back ON and check if E1 reappears after a cooling call.
• Step 2 – Check outdoor airflow: Inspect the outdoor Gree condenser. Make sure there is at least 24–36 inches of clearance around it. Remove leaves, plastic bags, or objects blocking the coil or fan discharge.
• Step 3 – Clean condenser coil (basic exterior clean): With power OFF, use a soft brush or low‑pressure water from the outside in a downward direction to remove dirt from the fins. Do not bend fins or use high pressure. Let it dry fully before restoring power.
• Step 4 – Verify outdoor fan operation: Restore power and run the unit in COOL. After the compressor starts, confirm the outdoor fan runs at normal speed and blows warm air out. If the fan does not start, runs slowly, or stops intermittently, the fan motor or its capacitor may be faulty.
• Step 5 – Call a technician if E1 persists: Persistent E1 after cleaning and airflow checks usually indicates high system pressure due to refrigerant overcharge, non‑condensables, blocked capillary/expansion valve, or a defective high‑pressure switch. A certified HVAC technician must connect gauges, check pressures, and test/replace the high‑pressure switch or service valve as needed.