Samsung Heat Pump Error Code E514

E514 indicates a low pressure sensor error caused by an open or short circuit in the sensor circuit. The control board monitors the sensor's output voltage and triggers this fault when that voltage drops below 0.4V, which signals either a shorted sensor, damaged wiring, or a failed connector. The system shuts down to protect the compressor until the fault is resolved.

No. The heat pump will typically disable itself when E514 is active precisely to prevent compressor damage. Attempting to bypass or ignore the fault and force the system to run risks damaging the compressor, which is the most expensive component in the system. Leave the unit off until the sensor circuit has been diagnosed and repaired.

A power reset may temporarily clear the fault code, but E514 will return if the underlying sensor circuit problem has not been corrected. Because the fault is caused by a hardware condition, specifically a voltage signal below 0.4V from the low pressure sensor circuit, the error will reappear as soon as the control board re-evaluates the sensor input. A proper repair of the sensor, wiring, or connector is required for a lasting fix.

Basic checks such as inspecting connectors for corrosion, ensuring the sensor harness is not pinched, and reseating plugs can be performed by a knowledgeable DIYer. However, testing sensor voltage and replacing the low pressure sensor or wiring harness requires electrical diagnostic tools and familiarity with refrigerant systems. If the fault involves the refrigerant circuit, a licensed HVAC technician is required by law to handle refrigerant.

Repair costs vary depending on the root cause. Sensor replacement parts typically range from $30 to $120 depending on the model, with labor adding $75 to $200 or more depending on your region and the technician's rates. If the control board is at fault, parts and labor combined can range from $300 to $700 or higher. A diagnostic service call is usually needed first to confirm which component has failed.