Samsung Heat Pump Error Code E103

E103 indicates that the discharge temperature sensor for fixed compressor 1 is reading either an open circuit or a short circuit. The control board monitors this thermistor to track compressor discharge temperatures, and when the signal falls outside the valid resistance range, it shuts down operation and displays E103. The fault protects the compressor from running without proper temperature oversight.

No. The system shuts down when E103 is triggered specifically to protect the compressor from operating without verified discharge temperature monitoring. Running the unit in this condition risks compressor overheating and failure. The fault should be diagnosed and resolved before the unit is returned to normal operation.

A power reset may temporarily clear the E103 code, but if the underlying sensor fault still exists, the error will return as soon as the system powers up and attempts to read the sensor signal. Resetting without repairing the root cause does not fix the problem and may mask the issue temporarily. The sensor connector, wiring, and sensor resistance should all be checked before concluding the fault is resolved.

Checking and reseating the sensor connector is a straightforward task that a knowledgeable DIYer can perform safely with the unit powered down. Measuring sensor resistance with a multimeter and comparing to a resistance table is also within reach for someone comfortable with basic electrical testing. However, accessing internal components, replacing the sensor, or diagnosing a PCB fault typically requires a qualified HVAC technician with refrigeration system experience.

If only the discharge temperature sensor needs replacement, parts typically cost in the range of $15 to $60 depending on the specific model, with labor adding $75 to $200 depending on your location and the technician's rates. If the control PCB is the root cause, board replacement can bring total repair costs to $300 to $700 or more. Getting a diagnostic visit to confirm the faulty component before committing to parts is recommended.