The most common causes for AC not cooling properly in Chevy Sonic are low or overcharged refrigerant, compressor malfunction, clogged cabin air filter, dirty condenser or evaporator coils, dirty or sluggish blower motor, and bad fuse or relay.

Engine overheating in Chevy Sonic is typically caused by a combination of factors, including insufficient coolant levels, coolant leaks from components like hoses or the radiator, a malfunctioning thermostat that fails to regulate coolant flow, a clogged radiator obstructing proper heat dissipation, faulty cooling fans not adequately cooling the radiator, and a worn or damaged water pump unable to circulate coolant effectively.

Low coolant is the most common reason that your Sonic will overheat. Low coolant is a symptom of a cooling system leak of some kind. It doesn’t just randomly disappear. Here are some of the reasons that your coolant may run low: Radiator damage Cracked/bad radiator hose Bad radiator cap Thermostat housing damage