Samsung Heat Pump Error Code E106

E106 indicates that the high pressure sensor circuit has been detected as either open or shorted by the control board. The high pressure sensor monitors refrigerant pressure on the discharge side of the compressor, and a voltage reading below 0.4V at the sensor connector confirms a short circuit condition. The system requires this sensor to function safely and will not operate normally while the fault is active.

Running the system with an active E106 fault is not recommended. The high pressure sensor is a key safety input that protects the compressor from operating under dangerous over-pressure conditions. Without a valid pressure signal, the control board cannot properly protect the system, and continued operation could cause compressor damage or refrigerant circuit failure.

Repair costs vary depending on the root cause. If only a connector cleaning or harness repair is needed, labor costs alone may range from roughly 75 to 150 dollars. If the high pressure sensor requires replacement, parts and labor together typically fall in the range of 150 to 350 dollars. If the control board is determined to be at fault, costs can increase significantly depending on the specific board and labor time involved.

Some portions of this diagnosis are accessible to a knowledgeable DIYer, such as inspecting the sensor connector for corrosion or loose pins and checking harness wiring for visible damage. However, verifying the actual refrigerant pressure using a manifold gauge and comparing it against the S-net sensor reading requires refrigerant handling equipment and certification. Sensor replacement is also straightforward if the correct part is identified, but any work involving the refrigerant circuit must be performed by a certified technician.

A power reset may temporarily clear the error code if the fault was caused by a momentary signal glitch, but E106 will return if the underlying wiring, connector, or sensor fault is still present. The error should be diagnosed and resolved before relying on a reset as a solution, since the fault condition affects a critical safety sensor.