Haier inverter AC error codes: full list and meanings
When a Haier AC has a fault, the display shows a code starting with E or F. E codes mostly concern the indoor unit, and F codes the outdoor unit. Each code is explained below.
Updated 11-Nov-2026
These meanings apply to most Haier inverter split AC models. A few models may differ, so check your AC's manual or model number too.
For any code, try this first
- Turn the AC off with the remote, then switch off the main switch or breaker for 5 minutes. Turn it back on and see if the code returns.
- Take out the indoor unit's filters, wash them with water, let them dry and put them back.
- Clear anything around the outdoor unit so air can flow freely.
- If the voltage is very low or very high, don't run the AC until it is normal.
Safety: never reach into an electrical panel, board, gas pipe or the inside of an inverter yourself. You can get a shock or release gas. This is a mistri's job.
E codes: mostly the indoor unit
These show on the indoor unit's display.
F codes: mostly the outdoor unit
These also show on the indoor display, but the fault is usually in the outdoor unit.
| Code | Meaning |
|---|---|
| F1 | IPM power module protection: fault in the module driving the compressor. Details |
| F2 | Sudden compressor overcurrent protection. Details |
| F3 | Lost communication between the power module and the outdoor main board. |
| F4 | Compressor discharge temperature protection. Details |
| F6 | Outdoor ambient temperature sensor fault. |
| F7 | Suction temperature sensor fault. |
| F8 | Outdoor DC fan motor fault. |
| F11 | Compressor lost synchronisation with the drive. |
| F12 | Outdoor board memory chip (EEPROM) fault. |
| F21 | Outdoor coil (defrost) temperature sensor fault. |
| F25 | Compressor discharge temperature sensor fault. |
Common questions
How do I clear a Haier AC error code?
Turn the AC off, switch off the main switch or breaker for 5 minutes, then start it again. If the cause has gone, the code clears. If it comes back, the fault is still there and a mistri should check it.
What is the difference between E and F codes?
On a Haier AC, E codes mostly point to the indoor unit, such as a sensor or the fan. F codes mostly point to the outdoor unit, such as the compressor, power module or outdoor sensors.
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