Samsung Heat Pump Error Code E113

E113 indicates that the Samsung heat pump has detected either a reversed phase sequence or a missing phase on the 3-phase power supply. The unit monitors all three power legs to ensure they are present and in the correct rotational order. This fault is triggered to protect the compressor and motors from damage. Voltage at the CN82 connector across all three leg pairs should read approximately 380V.

No, the heat pump will not operate while E113 is active, and you should not attempt to bypass the fault. The phase detection system is a protective feature that prevents the compressor and fan motors from running under damaging electrical conditions. Continuing to force operation could cause serious and costly compressor failure.

Repair costs depend on the root cause. If the issue is a reversed phase sequence in the field wiring, the fix is typically just a service call fee, generally in the range of $75 to $200. If a breaker or fuse replacement is needed, add $50 to $150 for parts and labor. A control board replacement, needed only if the phase detection circuit itself has failed, can range from $300 to $700 or more depending on the model and labor rates in your area.

Diagnosing and correcting 3-phase power issues involves working with high-voltage electrical systems, which carries serious safety risks. A licensed electrician or certified HVAC technician should perform the voltage measurements at CN82 and correct any wiring or supply issues. If the problem is a reversed phase sequence in the field wiring, a technician can swap two of the supply conductors to correct it without replacing any parts.

A simple power reset will not permanently clear E113 if the underlying phase problem still exists. The control board will re-detect the fault condition as soon as power is restored and the unit attempts to operate. The root cause, whether a missing phase, a blown fuse, or reversed wiring, must be corrected first before the error will clear and stay clear.