Samsung Heat Pump Error Code E117

E117 indicates that the low pressure sensor detected refrigerant pressure below 3.1 kg/cm2G during cooling or below 2.6 kg/cm2G during heating for 3 consecutive seconds before pump down begins. The system locks out operation to protect the compressor from running under unsafe low-pressure conditions. A manifold gauge measurement taken while the system is stopped is the recommended starting point for diagnosis.

No. The E117 lockout is a protective shutoff, and attempting to override or reset the unit repeatedly without addressing the root cause can result in compressor failure. Operating a heat pump with critically low refrigerant pressure can permanently damage the compressor, which is one of the most expensive components in the system.

Resetting the unit may temporarily clear the error code, but E117 will return if the underlying pressure problem has not been resolved. The system will re-detect the low pressure condition and lock out again within seconds or minutes of restarting. A reset is useful for confirming the fault is repeatable, but it is not a fix and should not be used as a substitute for proper diagnosis.

Some basic checks, such as inspecting for blocked airflow or dirty coils, can be performed without special tools. However, diagnosing and repairing refrigerant leaks, recharging the system, or replacing the low pressure sensor requires EPA 608 certification and specialized equipment. Most homeowners should contact a licensed HVAC technician for this repair.

Repair costs depend heavily on the root cause. A refrigerant recharge without a leak repair typically runs between $150 and $400, while locating and repairing a leak plus recharging can range from $300 to $800 or more. Replacing a low pressure sensor is generally in the $100 to $300 range including labor. A compressor replacement, if it has already been damaged, can cost $1,000 to $2,500 or higher depending on the unit.