Chevrolet Sonic cooling fan failure causing engine overheating and radiator overflow issues on Chevrolet Sonic

Some Chevrolet Sonic owners report experiencing cooling fan failures that can lead to engine overheating and radiator overflow issues. These problems may arise from a malfunctioning cooling fan that fails to adequately cool the engine, causing the engine temperature to rise. Additionally, if the engine temperature sensor is faulty, it may prevent the radiator fan from activating properly, exacerbating overheating concerns. Some owners have found that installing a radiator-mounted auxiliary thermostatic cooling fan switch can help trigger low-speed fan operation at lower temperatures, potentially mitigating cooling system issues. This highlights the importance of proper maintenance and timely repairs to prevent serious engine complications.