AC and fan Blowing hot

[mikes_box]

coming home i noticed that the vents were blowing a bit hot but didn't pay attention. went out to check my headlights and started the car and again the vent air was hot. hit the ac button and still hot, moved temperature all the way down to lo and still was hot. but when you turn the ignition off and just let the fan blow, the air cools down. the engine temp is where it is and no problem in terms of overheating. i changed the water pump and flushed the coolant about 1000 miles ago and had no problem like this before. car is a 00 2.7 with only 40k miles any ideas?

[wvicary]

Have the A/C system checked by a specialist.

[SPIRO]

Happened to me recently. The freon had all leaked out. Apparently, there is a leak in the system somewhere. The Dealer recharged it with freon containing a color dye/indicator, so that they can look to see where the leak is at a later date.

Edited August 4, 2009 by SPIRO

[rsfeller]

Happened to me recently. The freon had all leaked out. Apparently, there is a leak in the system somewhere. The Dealer recharged it with freon containing a color dye/indicator, so that they can look to see where the leak is at a later date.

On these cars it's pretty obvious when the compressor engages, you feel it through the entire system and you need to determine that variable first for self diagnosis. Could you ever sense it before? I know at an idle my engine dips 100RPMs whenever the AC engages. It can be replicated each time when you manually turn the AC on/off/on. If you don't sense it now then you system is low on freon or the system is damaged (open).

If you need more specific details on AC operation and care send me a PM.

If you hear/feel the AC compressor engaging then you have another issue, also send me a PM and I'll tell you about my crazy theory which is in reverse to my problem as seen here.