How to solve error codes on your Samsung indoor air conditioner

Intermittent C154 error:

• This error indicates that the indoor fan motor has entered protection mode.
• This occurs when the input voltage exceeds the normal operating range.
• If the voltage rises above approximately 290–310V, the overload voltage protection (OVP) is activated. The indoor motor then stops temporarily to prevent overheating or electrical damage.
• This error usually appears in areas where the household voltage supply is unstable or frequently exceeds the recommended level.
• Once the voltage stabilizes below 290V, the unit can operate normally again.

Continuous C154 error:

• The C154 error reappears within 10 seconds of restarting the air conditioner.
• This indicates a problem with internal components such as a defective fan motor or PBA (printed board assembly).
• Continuous C154 means the fan motor has failed, and the unit cannot recover on its own.
• A service inspection is required.

Follow these steps to determine whether the error is temporary or requires service:

If the error does not return: The issue was caused by a temporary voltage surge.

If the error repeats immediately: The fan motor or printed board assembly (PBA) may be defective. In this case, contact Samsung Service for inspection and repair.

• Ensure that your home’s electrical supply is stable. Installing a voltage stabilizer can help in regions prone to frequent power surges.
• Restart the air conditioner as the first troubleshooting step before requesting service.
• If the error appears often, even after a stable voltage is confirmed, schedule a service visit to rule out component failure.