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Samsung Air Conditioner

Samsung AC E466 error

Inverter board / power module protection

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 inverter drive (power module, DC voltage or heat sink) detected a fault and stopped the compressor.

Common causes

  • Voltage spike or unstable supply
  • Outdoor board overheating (poor air flow, very hot day)
  • Failed power module or board parts
  • Compressor wiring problem

Try this at home first

Tick each step as you go

When to call a technician

This needs a trained inverter technician. Users must never open boards or modules.

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 E466 mean on a Samsung Air Conditioner?

Inverter board / power module protection. The inverter drive (power module, DC voltage or heat sink) detected a fault and stopped the compressor.

Can I fix Samsung Air Conditioner error E466 myself?

You can try a reset first: Switch off at the MCB for 10–15 minutes. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with E466?

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

Other Samsung AC codes

E441 Temperature outside working range E458 Outdoor fan motor fault E461 Compressor start / rotation fault E462 Overcurrent / compressor overload E464 Inverter board / power module protection E465 Overcurrent / compressor overload E467 Compressor start / rotation fault E474 Inverter heat-sink temperature sensor fault E500 Inverter board / power module protection E554 Low gas / refrigerant leak or blockage

All Samsung Air Conditioner error codes

Sources

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

Last checked: 2026-10-20