Samsung Heat Pump Error Code E303

E303 indicates an IPM high temperature error on the outdoor fan motor circuit. The Intelligent Power Module, which controls the outdoor fan motor, has exceeded 150°C during operation. The system shuts down automatically to protect the power electronics from permanent damage. The most common trigger is a locked, seized, or obstructed outdoor fan motor.

No. The E303 fault causes the system to shut down specifically because the IPM temperature has reached a dangerous threshold of 150°C. Attempting to force the unit to operate in this condition risks permanent damage to the IPM power module and potentially the fan motor and associated wiring. Leave the unit off until the root cause is diagnosed and corrected.

Repair costs depend on the root cause. Clearing a physical obstruction may only involve a service call fee, typically in the range of $75 to $150. Fan motor replacement can cost between $200 and $500 including parts and labor. IPM or control board replacement tends to be more expensive, often ranging from $300 to $700 or more depending on parts availability and labor rates in your area.

A homeowner can safely inspect the outdoor unit for visible obstructions like debris or ice blocking the fan blade and clear them with power fully disconnected. However, if the fan motor is seized or the IPM board has failed, those repairs involve high-voltage components and should be handled by a certified HVAC technician. Attempting motor or board replacement without proper training and tools can result in injury or additional damage.

A power reset may temporarily clear the fault code and allow the unit to restart, but the error will return if the underlying problem is not resolved. If the fan motor is locked, the IPM is failing, or an obstruction is present, the temperature threshold will be exceeded again quickly after restart. A reset is useful only to confirm the fault is repeatable, not as a repair solution.