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Haier Air Conditioner

Haier AC F11 error

Compressor start / rotation fault

Needs a technicianFrom brand’s official support

Try a reset once. If it comes back, a trained technician should repair it.

What it means

The compressor did not start, lost its position signal, or is not turning properly.

Common causes

  • Low voltage at start-up
  • Faulty compressor wiring or inverter board
  • Jammed or damaged compressor

Try this at home first

Tick each step as you go

When to call a technician

If it returns, a technician must test the compressor and inverter board. Don’t keep restarting it.

Safety first

Always switch off at the wall socket or MCB before touching any part. Do not open the outdoor unit, control boards or gas pipes yourself — they carry high voltage and pressure.

Frequently asked questions

What does F11 mean on a Haier Air Conditioner?

Compressor start / rotation fault. The compressor did not start, lost its position signal, or is not turning properly.

Can I fix Haier Air Conditioner error F11 myself?

You can try a reset first: Switch off for 15 minutes and restart once. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with F11?

Avoid repeated restarts; running with this fault can cause more damage.

Other Haier AC codes

F2 Overcurrent / compressor overload F3 Communication error (power module ↔ main board) F4 Compressor overheating F6 Outdoor air temperature sensor fault F7 Suction pipe temperature sensor fault F8 Outdoor fan motor fault F12 Memory (EEPROM) error — outdoor unit board F13 Low gas / refrigerant leak or blockage F14 4-way (reversing) valve fault F19 Power supply voltage problem F20 High pressure / overload protection F21 Outdoor coil (condenser) temperature sensor fault

All Haier Air Conditioner error codes

Same code on other brands

F11 4-way (reversing) valve faultPanasonic AC

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20