Chevrolet Sonic overheating issue despite new water pump, thermostat, and coolant temp sensor, possible fan problem when A/C is off on Chevrolet Sonic

Some Chevrolet Sonic owners report experiencing persistent overheating issues even after replacing the water pump, thermostat, and coolant temperature sensor. These problems may stem from a malfunctioning electric fan, which is critical for cooling the engine, especially when the A/C is off. Additionally, a clogged radiator can hinder coolant flow, leading to inefficient cooling. Some owners also report problems related to a leaking head gasket, which can cause coolant leaks into the combustion chambers or engine oil. Low coolant levels, broken sensors providing inaccurate readings, air trapped in the cooling system, and even new thermostats malfunctioning due to poor quality can all contribute to overheating concerns. It is recommended that owners conduct a thorough inspection of the cooling system or seek professional diagnosis to identify and resolve the underlying issues effectively.