Ah, the "friend" thing. If that diagnosis worked we wouldn't need mechanics. It's more likely the system is low on charge which is typical after 10 years. Look on the passenger inner fender for the receiver / drier. Two steel lines will be bolted to it. One comes from the condenser and one goes to the firewall. On top of it will be a tiny glass window, about 1/4" in diameter. Watch for air bubbles flowing through that window while the engine is running and the AC is on. If you see bubbles, the system is low on refrigerant.
Fords have sight glasses too but don't rely on them. They will still have bubbles when the system is fully charged.
Wednesday, July 6th, 2011 AT 10:02 PM