There could be several reasons why your car's AC is running but not blowing cold air. Here are some common issues that you may want to check:
Refrigerant Leak: The most common reason for a lack of cold air is a refrigerant leak. Refrigerant is the substance that cools the air in the AC system. If there's a leak, the AC system won't be able to produce cold air effectively.
Compressor Issues: The compressor is responsible for compressing the refrigerant gas and circulating it through the AC system. If the compressor is faulty or not engaging properly, it can result in warm air blowing from the vents.
Faulty Condenser: The condenser is located at the front of the car and is responsible for dissipating heat from the refrigerant. If it's damaged or blocked, it can prevent the AC system from cooling the air.
Clogged Expansion Valve: The expansion valve regulates the flow of refrigerant into the evaporator. If it's clogged or stuck, it can restrict the flow of refrigerant and hinder the cooling process.
Electrical Issues: Various electrical components, such as fuses, relays, or sensors, control the AC system. If any of these components fail or malfunction, it can prevent the AC from working correctly.
Blower Motor Problems: The blower motor is responsible for pushing the cooled air into the cabin. If it malfunctions, the AC may seem to be running, but you won't feel any cold air.
Faulty AC Controls: Sometimes, the issue may not lie within the AC system itself but rather with the controls and settings. Ensure that the AC controls are set correctly and functioning as intended.
Blocked Cabin Air Filter: A clogged cabin air filter can restrict airflow and affect the cooling efficiency of the AC system.
If you're not familiar with car AC systems, it's best to take your vehicle to a qualified mechanic or AC specialist to diagnose and repair the issue. They will have the necessary tools and expertise to identify the specific problem and get your AC working correctly again.