The techs over at Pep Boys have put up some good tips for air conditioner care, including warning signs. If you experience any of these, don't take any chances and bring your car in for a checkup.
- A/C system doesn't cool vehicle to set temperature
- Fan/blower does not work when set in A/C mode
- Fan/blower is louder than usual
- Some or all of the dash controls do not work
- Heater, top and side vents, or defroster do not work
- A/C or engine makes loud noises when the heat or A/C is turned on
- Vehicle stalls or idles roughly when A/C is turned on
- Vehicle runs hot or overheats when A/C is on
- There is water on the car's floor
- Electric engine cooling fan quickly cycles on and off
- Unusual odors come from interior vents
- A/C unit has not been serviced regularly
- Windows fog when defroster is turned on