Have you checked power to the A/C compressor? Are your fans working when you turn the A/C on? Have you checked for any leaks on the A/C lines that are in the engine compartment? The relay could be in the engine compartment or under the dashboard, driver side.
SOURCE: 99 STS AC is blowing hot air
I had the same problem but it was blowing hot air on the passenger side of the car. I assume you have the dual zone controls that I have as well. The problem is most likely the damper that controls the flow of hot and cold air into the car. The motorized component of the damper is most likely not working and its stuck in the hot air position.
I had mine replaced by a repair shop so I cant tell you how to replace it but it may be something that you can do if you have the time and patience to work on it.
Good luck
SOURCE: a/c in jetta blows hot air, its been charged, compressor comes on.
you need to have it diagnosed by a professional. These are complicated systems even to a trained tech. You may be over or under charged, have a clogged expansion valve, have a leak or many other issues. This model has a rcv refrigerant control valve inside the compressor which regulates the pressure of the compressor. If you notice the compressor never shuts off like conventional auto a/c's do the only time the clutch works is when you turn it on or off. Can be complicated.
SOURCE: ac not working, blows hot air only. Recharged
Check the evaporator coil by sniffing the vents,floor is best, with your tester.
SOURCE: 1995 vw jetta gl air conditioner fuse 2.0 l
You may not be full of refrigerant... There is a low pressure switch that prevents the AC from actuating the clutch, and the reason is: IF there is not enough refrigerant, you will not be able to move oil through the system and you will have major damage...so no engauge...
Get the system checked, most likely there is a leak somewhere..
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