Samsung Air Conditioner Error Code E152

E152 indicates that the indoor unit's Electronic Expansion Valve (EEV) has failed to open on two consecutive detection attempts. The system sends open commands to the valve via the PCB, but the valve does not respond, triggering a lockout. This error is a second-detection fault, meaning the system already attempted recovery once before escalating to E152.

No. The E152 fault causes the system to shut down specifically because operating with the EEV stuck closed would prevent refrigerant from flowing properly through the indoor coil. Forcing the system to run under these conditions could damage the compressor due to refrigerant starvation or abnormal pressures. Leave the unit off until the fault is diagnosed and repaired.

Repair costs vary depending on the root cause. If the fix is a reconnected wiring harness, the cost may be limited to a service call fee, typically in the range of $75 to $150. Replacing a failed EEV stepper motor or valve body generally costs between $150 and $400 including parts and labor. PCB replacement is usually the most expensive repair, often ranging from $250 to $600 or more depending on the unit model.

A homeowner can safely check whether the EEV wiring harness has become loose or disconnected at the indoor PCB, since this is the first recommended diagnostic step and requires no special tools. However, testing stepper motor coil resistance, diagnosing PCB driver circuits, or replacing the EEV requires technical knowledge and specialized tools, so those steps should be handled by a qualified technician.

A power reset may temporarily clear the fault display and allow the unit to attempt startup again, but if the underlying problem with the EEV or its wiring has not been corrected, the error will return quickly. Because E152 is a second-detection fault, the system has already attempted one recovery cycle on its own, making a simple reset unlikely to resolve the issue.