Samsung Air Conditioner dF Error Code

Defrosting the outdoor unit on Samsung air conditioners.

Samsung All Samsung air conditioner codes

Easy DIY fix

dF means the unit is defrosting the outdoor coil during Heat mode. That's normal. The indoor fan pauses so you don't get a blast of cold air, and steam rising off the outdoor unit is expected.

Compatible models

Samsung heat pump (heating-capable) wall units. Cooling-only models never defrost, and Samsung gives no model list.

Also shown as

Only appears in Heat mode, mostly when it's cold and damp outside. Samsung says a defrost usually lasts about 5 to 12 minutes.

Difficulty

Most people can clear this one at home with simple checks.

How to fix
When to call a pro
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 dF

Wait for the cycle to finish
Leave the unit running. Heat comes back by itself once defrost ends.
Keep the outdoor unit clear
After the cycle, if snow or ice is piling up around the base or sides of the outdoor unit, switch off the breaker first. Brush snow away by hand or with a soft broom so meltwater can drain, and let ice melt rather than chipping at it.

When to call a technician

If dF comes up very often or the outdoor unit stays encased in ice, have a technician check the defrost controls and refrigerant system.

Step-by-step guides for this problem

Air ConditionerTroubleshootingHeat Pump Not Heating? Settings, Defrost and Fixes to Try
A heat pump that seems to stop heating is often just in its defrost cycle, which Trane says usually lasts 3 to 5 minutes and can send cool air or steam out of the outdoor unit.
6 min readRead guide

Frequently asked questions

Which Samsung models show the dF code?

Samsung heat pump (heating-capable) wall units. Cooling-only models never defrost, and Samsung gives no model list.

Can I fix Samsung dF myself?

Usually, yes. Most dF problems clear with simple checks you can do at home. Start with the first step above: wait for the cycle to finish.

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