1995 850 N/A. So, last year I replaced the evaporator and drier. Thing ran nicely. There is a heat wave here in NY (as everywhere else). The air is not even cool from the A/C. I have one of those kits where you pierce the can with a gauge attached and add freon. I hooked up the can (started the car...ran it...turned on the A/C). Pierced the can, then unwound the **** to let the freon enter the system. Without even letting the freon into the system too much, the little gauge read up about 60-ish, appears to be way beyond the recommendation. The freon didn't even flow from the can...I can tell, the can barely got cold. I closed down the can-kit and put the cap back on the port. The A/C is lousy now. HELP!

 

Ok so what you need to do is connect the recharge cable or the freon and turn the car on , turn the ac on and turn the fan to full blast and start recharging. It's should be cycling on and off if it's low on freon. And another tip: the do it yourself ac charge cans can't put out enough pressure to overcharge. Good luck

 

When you turn the system on, does the compressor come on? If so, do like ded137t5r said, with the car running, and the ac on full blast, not auto, and the temp cranked all the way to full cold, hook up the gauge. If the compressor kicks on and the pressure is higher than 45 - 50 psi, the system does NOT need any more freon or gas.

If the compressor is coming on and it's not cold enough for you, your system is likely in need of professional care. Vac and oiled and serviced.

To be honest with you a 16 - 17 year old system is not going to be that great. Volvo's AC has never been the coldest. When it's 100 out with 112 heat index because of the humidity, not to may cars are to cold, especially for first 10 minutes of driving.