ErrorKhoj

Samsung Air Conditioner

Samsung AC E403 error

Indoor coil anti-freeze protection

You can usually fix itCross-checked from 2+ sources

Most people can clear this with the simple steps below.

What it means

The indoor coil became too cold (close to icing), so the AC paused the compressor to protect itself.

Common causes

  • Very dirty air filters or coil
  • Indoor fan running too slow
  • Low gas
  • Very low temperature set for many hours

Try this at home first

Tick each step as you go

When to call a technician

If it repeats with clean filters, get the gas level and indoor fan 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 E403 mean on a Samsung Air Conditioner?

Indoor coil anti-freeze protection. The indoor coil became too cold (close to icing), so the AC paused the compressor to protect itself.

Can I fix Samsung Air Conditioner error E403 myself?

Usually yes. Start with: Switch off and let any ice melt for 30–60 minutes.

Is it safe to keep using the Air Conditioner with E403?

Yes, once the cause is fixed.

Other Samsung AC codes

E201 Communication error (indoor ↔ outdoor unit) E202 Communication error (indoor ↔ outdoor unit) E203 Communication error (between control boards) E221 Outdoor air temperature sensor fault E231 Outdoor coil (condenser) temperature sensor fault E251 Compressor discharge temperature sensor fault E407 High pressure / overload protection E410 Low gas / refrigerant leak or blockage E416 Compressor overheating E422 Low gas / refrigerant leak or blockage E440 Temperature outside working range E441 Temperature outside working range

All Samsung Air Conditioner error codes

Sources

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

Last checked: 2026-10-20