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Samsung Air Conditioner E466 Error Code

Power supply voltage problem. What it means, which models show it, and how to clear it, easiest fix first.

SamsungAll Samsung air conditioner codes

E466
May need a pro

The outdoor unit has detected that the DC voltage inside its inverter is too low or too high. This usually traces back to the incoming power supply, a loose supply connection or an inverter board fault.

Compatible models

Samsung doesn't publish a model list for this code; it appears on Samsung air conditioners with a digital display. Check your owner's manual.

Also shown as

Shown as E466 or C466. Some models also use E483 for an over-voltage condition. Meanings here come from Samsung service and installation manuals for specific model families; codes vary by series and region, so check your owner's or service manual.

Difficulty

Try the basic checks, but the usual fix is a technician's job.

Safety first: unplug the air conditioner (or switch off its breaker) before touching filters, hoses or panels. If you smell burning or gas, or see water near the outlet, stop and call a professional.

How to fix Samsung E466

  1. Check the breaker

    Make sure the breaker for the outdoor unit is fully on and hasn't half-tripped. If it trips again when reset, leave it off.

  2. Reset the power at the breaker

    Switch off the breaker that feeds the air conditioner (some systems have separate breakers for the indoor and outdoor units, so switch off both). Wait about five minutes, switch the power back on and restart the unit to see if the code clears.

When to call a technician

If the code persists, have a technician or electrician check the supply voltage and the inverter board.

Parts linked to E466

These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.

Order parts by your full model number so they fit.

Frequently asked questions

What does E466 mean on a Samsung air conditioner?

The outdoor unit has detected that the DC voltage inside its inverter is too low or too high. This usually traces back to the incoming power supply, a loose supply connection or an inverter board fault.

Which Samsung models show the E466 code?

Samsung doesn't publish a model list for this code; it appears on Samsung air conditioners with a digital display. Check your owner's manual.

Can I fix Samsung E466 myself?

Only the basic checks. You can safely try the steps above, but E466 usually points to a part or fault that needs a technician.

What if E466 keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when E466 appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Other Samsung air conditioner codes

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.

Sources we checked