Your vehicle's heating and A/C systems wear gradually with use, so routine maintenance keeps the cabin comfortable. The A/C system also runs your defrost in winter, making it important year-round.
Need tires? Shop tires for your vehicle →
AAA Members
Not a AAA MemberA/C only somewhat cooler than outside air
Damp, stuffy, or moldy smell
No cabin heat in cold weather
Weak or non-working defroster
Works only while driving, not idling
Heater blows chilly air or A/C blows warm
Weak vent pressure at the highest setting
Inspect the interior and blower operation.
Check coolant level and inspect hoses.
Test the A/C compressor belt.
Pressure-test the cooling system.
Compare A/C pressure against spec.
Test for refrigerant leaks.
