Samsung Heat Pump Error Code E151

E151 indicates that the heat pump detected an instantaneous power interruption and temporarily stopped the compressor as a protective measure. This is a compressor protection action, not a true system fault. The unit is designed to resume normal operation automatically once incoming power is stable and the refrigerant pressures have equalized.

Yes, E151 is a protective event that indicates the system responded correctly to a power disturbance. The compressor was stopped intentionally to avoid damage, and the unit is safe to operate once it resumes. However, frequent recurrences should be investigated to rule out an underlying electrical supply problem that could eventually cause real component damage.

If the cause is a loose connection, the repair cost is typically low, often just the cost of a service call ranging from $75 to $150. If a circuit breaker needs replacement, parts and labor may range from $150 to $350. Wiring repairs or panel upgrades can cost significantly more depending on the scope of work required.

In most cases, yes. The E151 code is a protective response to a momentary power loss, and the unit should restart automatically once power is restored and stable. If the code appears repeatedly, the electrical supply circuit should be inspected for loose connections, low voltage, or an undersized breaker.

Cycling power to the unit at the breaker or disconnect can clear the E151 indication and allow the system to restart. However, if the root cause is an unstable or inadequate electrical supply, the code will return. A reset is appropriate as a first step, but repeated events require a thorough electrical inspection.