98 Jetta Tdi, 5-speed. Coming home the other day when it was pretty warm out and the AC would only put out coolish air, its usually ice cold. This was the first time this season I needed it, about 15 minutes into the trip and the AC came on like it used to. Now just getting the mildly cool air all the time. The fans are coming on, I can feel the compressor engauging when I press the button and I just replaced the ambient temperature sensor anyone have a suggestion on my next step? Thanks.