Another AC diagnostic thread...

Tried my AC today for the first time in about 3 months and I don't have any cold air. Just plain, regular, ambient temperature air blowing. Compressor seems to be working since I can hear it and see the clutch engage when I turn the AC on. There seems to be some refrigerant in my system (very briefly pressed on the low pressure valve and there is some pressure). The AC light stays on, its not blinking. Fuse and relay are ok. Any suggestions at what the problem might be? Low refrigerant level?

 

Yes.

Start there and then go from there.

 

Sounds like you're low and probably have a slow leak someplace. You can recharge it with dye to find the leak, but you're going to need to resolve the leak to get the system back 100%.

 

Look around the ac compressor and associated lines for residue, it is low on refrigerant and needs a charge. I had a leaking o ring on the high pressure line leavinf the compressor and I fixed it with a $20 o ring set. Do not do anything without a gauge set, you are flying blind without knowing the pressures.