Alliance error code F1
What it means
Indoor ambient temperature sensor fault.
Possible causes
Room thermistor failed Connector loose Damaged wiring
Suggested fix
Check connector integrity and cable condition and compare thermistor resistance to the Alliance/Midea curve; fit a new sensor if readings are irregular or unstable.
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 Alliance codes
- E1 — Communication error between indoor and outdoor units (Midea-platform logic).
- E2 — Indoor temperature or evaporator sensor error.
- E3 — Refrigerant leak or low capacity protection.
- E4 — Compressor or discharge temperature error.
- E5 — Fan motor fault.
- EC — Refrigerant leakage alarm.
- F0 — Low refrigerant protection.
- F2 — Indoor evaporator temperature sensor fault.
- F3 — Outdoor ambient temperature sensor fault.