Samsung Heat Pump Error Code E305

E305 indicates a fan motor reverse rotation error on the outdoor unit. The system detected that the outdoor fan motor was spinning counter-clockwise (CCW) before the unit attempted to start. Samsung's control system monitors rotational direction during the pre-start phase and shuts down operation to prevent mechanical damage when reverse rotation is detected.

A reset may temporarily clear the E305 code, but it will return if the underlying cause is not resolved. If strong wind was the trigger, clearing the fault after conditions normalize is reasonable. If the error reappears on a calm day, a component-level diagnosis is necessary before another reset will have any lasting effect.

Repair costs vary widely depending on the root cause. If the fix is limited to a service call and wiring repair, costs typically range from $80 to $250. Replacing a faulty outdoor fan motor generally runs between $200 and $500 including parts and labor. A failed inverter or control board replacement can range from $300 to $700 or more depending on the specific model and labor rates in your area.

If the fault was triggered by strong winds, you may be able to clear it yourself by waiting for wind conditions to calm and then resetting the unit. However, if the error persists after the wind subsides, the cause is likely a wiring issue, faulty motor, or failed control board, all of which require hands-on electrical diagnosis best performed by a qualified HVAC technician.

No. The E305 fault prevents the unit from starting as a protective measure, and attempting to force operation with a reverse-rotating fan can damage the fan motor or other outdoor unit components. Leave the unit shut down until the cause is identified and corrected.