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Haier Air Conditioner

Haier AC F20 error

High pressure / overload protection

Needs a technicianFrom brand’s official support

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

What it means

Refrigerant pressure or temperature is too high, so the AC stopped itself for safety.

Common causes

  • Very dirty outdoor coil or blocked air flow
  • Outdoor fan not working
  • Outdoor unit in a closed space or very hot sun
  • Overcharged gas or a blockage in the pipes

Try this at home first

Tick each step as you go

When to call a technician

If it repeats, get the outdoor coil cleaned and the gas pressure checked.

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 F20 mean on a Haier Air Conditioner?

High pressure / overload protection. Refrigerant pressure or temperature is too high, so the AC stopped itself for safety.

Can I fix Haier Air Conditioner error F20 myself?

You can try a reset first: Switch off for 15–30 minutes. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with F20?

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

Other Haier AC codes

F8 Outdoor fan motor fault F11 Compressor start / rotation 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 F21 Outdoor coil (condenser) temperature sensor fault F22 Overcurrent / compressor overload F23 Overcurrent / compressor overload F24 Current sensor (CT) fault F25 Compressor discharge temperature sensor fault F28 Compressor start / rotation fault

All Haier Air Conditioner error codes

Sources

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

Last checked: 2026-10-20