Samsung Heat Pump Error Code E513

E513 indicates a high pressure sensor error caused by an open or short circuit in the sensor circuit. The control board detects this fault when the sensor signal voltage drops below 0.4V, which falls outside the normal operating range. The system shuts down because it cannot safely operate without accurate refrigerant pressure data. The fault can be caused by a failed sensor, damaged wiring, a corroded connector, or in rare cases a faulty control board.

No, you should not attempt to run the unit while E513 is active. The error indicates the control board has lost reliable high pressure sensor data, which means the system has no way to detect dangerously elevated refrigerant pressures. Operating without this protection could damage the compressor or other refrigerant circuit components. Leave the unit off until the fault is diagnosed and repaired.

Repair costs vary depending on the root cause. If only the sensor connector needs cleaning or reseating, the cost may be limited to a service call fee, typically in the range of $75 to $150. A replacement high pressure sensor generally runs between $40 and $120 for the part, plus labor. If the control board is the cause, parts alone can range from $150 to $400 or more, making total repair costs considerably higher.

Basic checks such as inspecting the sensor connector for looseness, corrosion, or visible wire damage can be done by a knowledgeable DIYer. However, accurately diagnosing the fault requires a multimeter to measure sensor output voltage, and replacing the sensor or control board involves working with refrigerant-side components that may require a certified technician. If the wiring and connector appear intact, professional service is recommended.

A power reset may temporarily clear the fault code, but if the underlying sensor, wiring, or connector issue is still present, E513 will return once the system restarts and the control board reads the signal voltage again. Resetting without repairing the root cause is not a reliable fix. The error should be diagnosed and the faulty component repaired or replaced before returning the unit to normal operation.