Sinclair error code F1
What it means
Indoor air (room) temperature sensor fault.
Possible causes
Room thermistor open or short Connector loose Sensor wiring damaged
Suggested fix
Test sensor resistance versus temperature, inspect wiring and reseat the connector; replace the sensor where readings are outside specification.
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 Sinclair codes
- E1 — High pressure protection or system high-pressure fault.
- E2 — System low-pressure fault.
- E3 — System low-pressure protection (severe or repeated low-pressure event).
- E5 — Current protection on compressor or fan circuit.
- E6 — Communication error between indoor and outdoor units.
- F2 — Indoor coil temperature sensor fault.
- F3 — Outdoor ambient temperature sensor fault.
- F4 — Outdoor coil temperature sensor fault.
- F5 — Discharge line temperature sensor fault.