Cadillac ATS hot air blowing through vents with A/C selected on Cadillac ATS

Some Cadillac ATS owners report experiencing hot air blowing through the vents even when the A/C is selected. This issue may arise from insufficient refrigerant in the A/C system, potentially due to leaks or a lack of recent recharging. Additionally, a broken blower motor can lead to improper air flow or inconsistency when the A/C fan is activated. In cases of extremely hot air, a failed HVAC controlled valve in the engine coolant loop may allow hot water to circulate to the heater core despite the heater being off. Furthermore, problems with the actuators in the HVAC system can cause hot air to blow through specific vents, such as the passenger side, even when the temperature is set to the coldest setting. It is advisable for owners experiencing these issues to consult a professional mechanic for a thorough inspection and prompt resolution to ensure the A/C system operates effectively.