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Samsung Air Conditioner E153 / E665 Error Code

Drain pump or float switch problem on Samsung air conditioners.

Samsung All Samsung air conditioner codes

E153 / E665

Moderate DIY

Something is wrong with the indoor unit's condensate drain. On the models whose manuals list it, E153 means the float switch has caught water rising in the drain pan, while E665 relates to the drain pump or, on some systems, the signal from an external drain pump. A blocked drain line or a failed pump is the usual cause.

Compatible models

E153 is in the service manual for the AC018/AC024 MNADCH high-wall units. E665 is listed for WindFree wall units in the AR**TSF series and DVM WindFree wall units (AM***TNVD), including wall units set up with an external pump.

Also shown as

Gravity-drained units without a pump or float switch won't show these codes.

Difficulty

Start with the safe checks below; a worn part may need replacing.

How to fix
When to call a pro
Parts
FAQ

Not sure you are reading the code right? See how to read Samsung air conditioner codes.

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 E153 / E665

Switch off the power
Turn off the air conditioner's breaker before checking anything. If water is dripping near an outlet or light fixture, switch off that circuit too.
Check the drain line outlet
Find where the condensate line ends, outdoors or at a floor drain, and clear any dirt, leaves or insect nests you can reach at the open end.
Clean the filters and restart
Wash the indoor filters and let them dry, then restore power and restart the unit.

When to call a technician

If the code returns, the drain pump, float switch or internal drain line needs a technician.

Parts linked to E153 / E665

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.

Step-by-step guides for this problem

Air ConditionerTroubleshootingAC Leaking Water Indoors? 6 Causes and How to Fix Each One
An indoor AC unit that drips is usually dealing with condensate that can't drain away: a clogged drain line, a coil that froze because the filters are dirty, or a unit or drain hose that isn't sloped correctly.
4 min readRead guide

Frequently asked questions

Which Samsung models show the E153 / E665 code?

Can I fix Samsung E153 / E665 myself?

Often. The first steps above are safe checks a homeowner can do. If they don't clear E153 / E665, the cause is likely a worn part that needs replacing.

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