Gree error code E3
What it means
Low pressure protection.
Possible causes
Refrigerant leak or undercharge Dirty indoor filters causing poor airflow Restriction at expansion device or liquid line
Suggested fix
Inspect indoor filters and coil, check suction pressure and look for frost or oil traces indicating leaks; a technician should repair any leaks, recharge properly and clear restrictions before restoring operation.
Safety first. Isolate the power supply before inspecting any unit. Refrigerant-circuit
and electrical repairs must be carried out by a qualified, registered technician.
Other Gree codes
- C5 — Configuration jumper or PCB setup error.
- E1 — High pressure protection in the refrigeration circuit.
- E5 — Overcurrent protection on compressor or main circuit.
- E7 — Mode conflict between indoor and outdoor units.
- F1 — Indoor ambient (room) sensor fault.
- F2 — Indoor evaporator temperature sensor fault.
- F3 — Outdoor ambient temperature sensor fault.
- F4 — Outdoor coil temperature sensor fault.
- F5 — Compressor discharge temperature sensor fault.
- H1 — Defrost mode status indication (not a fault).