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Daikin Air Conditioner

Daikin AC F3 error

Compressor overheating

Needs a technicianCross-checked from 2+ sources

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

What it means

The gas leaving the compressor is too hot, so the AC stops to protect the compressor.

Common causes

  • Low gas / leak
  • Dirty outdoor coil or poor air flow
  • Faulty sensor or expansion valve

Try this at home first

Tick each step as you go

When to call a technician

If it repeats, a technician should check gas pressure, the outdoor coil and the sensor.

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 F3 mean on a Daikin Air Conditioner?

Compressor overheating. The gas leaving the compressor is too hot, so the AC stops to protect the compressor.

Can I fix Daikin Air Conditioner error F3 myself?

You can try a reset first: Switch off and let it cool for 30 minutes. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with F3?

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

Other Daikin AC codes

E3 High pressure / overload protection E5 Compressor start / rotation fault E6 Compressor start / rotation fault E7 Outdoor fan motor fault E8 Overcurrent / compressor overload EA 4-way (reversing) valve fault F6 High pressure / overload protection H0 Compressor start / rotation fault H6 Compressor start / rotation fault H8 Current sensor (CT) fault H9 Outdoor air temperature sensor fault J3 Compressor discharge temperature sensor fault

All Daikin Air Conditioner error codes

Same code on other brands

F3 Outdoor air temperature sensor fault / Overcurrent / compressor overloadVoltas AC F3 Outdoor air temperature sensor fault / Compressor discharge temperature sensor faultBlue Star AC F3 Communication error (power module ↔ main board)Haier AC F3 Outdoor air temperature sensor faultGree AC

Sources

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

Last checked: 2026-10-20