is the a/c clutch kicking in? you can shine a light down to it and see if it is. A common failure is the clutch assembly within the pulley... Test it for resistance, should be 3-6 ohms ish (full spec on the web), but should not be 'open'I have a 2003 VW Jetta TDI 1.9L. My issue is my a/c isn't blowing cold air, all it's blowing is hot air. I've checked the fuse and its good, then I checked the temp control knob to see if it was sticking in the hot temp setting but after looking at the cable by the gas pedal it was working properly. so then I figured it needs to be recharged with coolant, but when I connect the pressure gauge it reads that there is pressure, but its in the red zone of the gauge. not sure what the issue is but I figure having the pressure being in the red is the reason why my a/c isn't working. what should I do to correct this issue and or what else could be the issue if it isn't the pressure problem?
so I did this step : "Manual AC (as opposed to Climatronic AC or Climatic AC -the transmission type is immaterial) cars, push the AC button in, place a fan in slow and leave your key to ON (engine does not have to be running). Both fans should run in slow (unless it is near freezing or your refrigerant pressure is too low.) If your AC light does not come on and your cabin fan does not work, do not proceed until you have troubleshot and fixed this problem; this is the primary signal to turn on the AC system."
both fans are running. so what is the next step to correct my ac? it still isn't cold at all.