TCL error code P4
What it means
Fan speed error or monitored speed out of range.
Possible causes
Fan unable to reach commanded speed Hall or tach sensor failure Motor or driver fault
Suggested fix
Check for mechanical obstruction, verify motor and speed sensor wiring and test driver outputs; replace the motor or controller based on measured evidence from diagnostics.
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 TCL codes
- E1 — High pressure protection.
- E2 — Indoor evaporator 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.
- P0 — High voltage protection.
- P1 — Low voltage protection.
- P2 — Condensate pan full or water-level protection.