Carrier error code E1
What it means
High pressure protection in the refrigeration circuit.
Possible causes
Blocked or dirty condenser coil Refrigerant overcharge Closed liquid or discharge service valves
Suggested fix
Clean and inspect the condenser coil and verify condenser fan operation, check valve positions and measure high-side pressure; adjust charge and correct mechanical problems following Carrier service procedures.
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 Carrier codes
- E2 — Evaporator coil temperature sensor fault.
- E3 — Low pressure protection.
- E4 — Compressor discharge temperature protection.
- E5 — Overcurrent or overload protection.
- E6 — Communication error between indoor and outdoor units.
- EC — Refrigerant leak detection alarm.
- F0 — Low refrigerant protection.
- P0 — High voltage protection.
- P1 — Low voltage protection.
- P4 — Fan speed fault.