So this morning I drove my car and I turned the ac on to help clear the windshield. Well the ac wouldnt kick in I checked the fuse and relays they are good. Clutch isnt locked up so im thinking maybe its low on freon. I replaced the compressor 5 months ago with one from pick in pull. I dont think I replaced the orings on the lines if I remember right I forgot to pick them up and didnt realize it until I had it tore apart. It lasted all through summer and worked a couple weeks ago to. Ive been told the cold can make older systems leak. Is that true? If it is it maybe the orings leak in freezing temps? Would a stop leak and seal conditioner help? Any insight is appreciated.