I bought this used. Was hoping it just needed the ac recharged. Went through the steps of recharging it and had Car on AC blowing on high with doors open etc. At first the pressure read low but as soon as we started to add the coolant it went straight to red. Does not blow cold at all... but tries to a little bit when it first starts up. A friend said the compressor is running but I cannot verify that since I'm not sure where it's located. I see the belts but I'm not sure which one is which. The three that I can see all seem to be spinning.