Check the AC fuse
Check the AC relay
Inspect the cabin air filter
Verify the AC compressor clutch
Check refrigerant level
Look for refrigerant leaks
Inspect AC belts and pulleys
Test the condenser fan
Check the blower motor
Inspect AC pressure switches
Examine the expansion valve or orifice tube
Check the evaporator for blockage
Recharge the system if low
Repair or replace damaged hoses and seals
Replace faulty sensors
Clear clogged drain lines
Test the climate control module
Have the system evacuated and recharged properly
Replace worn compressor components
Take the vehicle to a certified mechanic