Could be the compressor. Check it to see if it is working. Do you hear the clicking sound? Mine did that for a while until it just had warm air coming out all the time. We need an evaporator and had been recharging for a couple of years or so.

If the compressor is working then I was told it could be the controls (you know, where the AUT knobs are, there's a board in the casing that may be malfunctioning) in the cabin. In earlier models you could solder something in there and fix the problem. But not in our model. The whole part would need to be replaced and used ones are usually not available...the new part costs around 6 or $700.

Post what you find out. The expense of all this is scary.

I've been in FL. without A/C since April.
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'95 854T 120,000