No cold air from vents - 97 Blazer LT

[jeanguenat]

I am a new 97 Blazer owner. The air conditioning worked when I bought it a few weeks ago. Now; however, I just get outside air from the vents. The pressure at the accumulator is 45 psig with the A/C on and the compressor running. The compressor clutch engages when the A/C is turned on. The dampers and vacuum system seem to work fine on all the settings (when I turn the controls to MAX A/C, a get flippity flop noises from behind the dash and then lots of air out the dash). The accumulator gets cold after a while, the compressor outlet gets hot after a while.

I doubt any of these items are related, but this is the work that I have done on the Blazer in the past few weeks:

I recently had the coolant system flushed, the serpentine belt replaced, and I replaced an O2 sensor (upstream, passenger side) due to SES light on.

Is there any thing else I can check before taking it to a A/C shop?

[BlazerLT]

I would take it to a AC service center and have the system recharged and have it checked for leaks.