AC blows cold air when car is not moving, then hot air when moving.
- posted
17 years ago
AC blows cold air when car is not moving, then hot air when moving.
You haven't said what model and year but this is fairly universal.
I think #1 is the best guess.
Go to a good AC guy and have the pressures tested. I *think* you'll find the coolant (once called Freon) is low. Slow leaks are common and they reveal themselves every year or two.
Also, get a thermometer for the vent (couple of bucks). You should easily get 40 F at the vent when everything is working properly.
I used to do my own AC and readily got nearly 30 F at the vent with a new drier, good vacuum, and coolant charge. Even with the new stuff (134A?), I easily get under 40 F at the vent on a hot day.
Chuck Fiedler Nothing but Volvo since 1974
In what? Could be a vacuum leak opening the heater control valve if the car has a vac operated valve.
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