I have a 95 2.2 wagon. Got my A/C charged/serviced a month ago at the Subie dealer ($120) so I started using it for the first time this past week. Before I got it charged it was working fine just was blowing cool air and not cold air. Now after the visit the A/C is clicking under the hood behind the passenger side firewall like some type of a relay or sending unit sound occurs. It is also making that sound when im stopped at an idle it clicks on and off it sounds like the idle of the car is changing and the A/C is surging cold air while the compressor is turning on and off. It is not a rapid on and off but a short delay between clicks. Or when im under load it clicks and you can tell it's turning on and off the compressor because the car is noticeably losing power with the A/C on. It also is surging cold air on and off while that is happening. I know the compressor is working but this sounds like a thermostat sending unit or relay issue. Any ideas? Thanks...