NYCA8L

I bought an A8L 2006 with 61K. The Freon was extremely low so i did a drain and refill turn the AC on to 65 degrees and its blowing warm still. I haven't scanned the car yet for codes.Any tips of where to look.

Tstealth32

Did you use a manifold and pull a vacuum? What did you exactly do to refill it?

NYCA8L

they used that machine on wheels. first it suck the old freon out and refills is with new freon.

TSHong

Was it working before? How much did they refill? If it's a decent shop, they should be able to figure it out for you.

MP4.2+6.0

Sounds like they were using pro equipment and I expect they had fill capacity for it. If fill was in order, other ideas are:

1. Pressure switch. Seems like a number of posts on that in last few years. Run VCDS scan to see if it has a code. Search on prior posts as needed.

2. Maybe heater valve is stuck open? Turn HVAC system to Econ mode so compressor is off. Have car up to operating temp. Just leave the temperature setting at a normal level. Maybe direct air specifically out of one set of vents (like dash) so you know you are feeling airflow. Go for drive(s). If air feels like ambient temperature in general, then heater valve should be shut off, as expected in summer. But, if you feel obviously heated air coming out--after you have been driving a while for parking/sun heat to get run through--the heater valve must be stuck open. Be sure to check both driver's side and passenger side, since each is separately controlled.

3. Look for any VCDS codes for stuck HVAC flaps.

4. Be sure the HVAC condensation drains aren't clogged. With AC running, or rather after parking, you should end up with the typical water puddle underneath, at least if parked in shade/garage. No puddle = suspect clogged drains. Search for how to posts if needed.