Check that the AC is turned on, set to cold, and the fan is working
Check the cabin air filter and replace it if clogged
Check the AC fuse and relay
Inspect the compressor clutch for engagement
Check refrigerant level with proper gauges
Look for visible leaks in hoses, seals, condenser, and compressor
Repair any damaged or leaking AC components
Evacuate and recharge the system with the correct refrigerant type and amount
Check the condenser for dirt, blockage, or damage and clean or replace it
Inspect the drive belt for wear, looseness, or breakage
Check the blower motor and resistor if airflow is weak
Test the pressure switches and AC sensors
Inspect the expansion valve or orifice tube for blockage
Verify the cooling fans are operating properly
Scan for AC-related trouble codes with an OBD2 scanner
Replace faulty compressor, condenser, evaporator, valve, or control parts as needed
Have a certified mechanic service the system if the problem continues