AC Won't kick in - 06 2.3L Hatch
 

So I just bought a used '06 Mazda 3 Hatch this past year. Currently has 155k on it.

The previous owner had cut the AC belt because it was making noise. I traced the problem to the pulley bearing which had partially seized. I replaced the pulley and clutch.

Still the AC won't engage (no power to the clutch coil) unless I jump the relay line to load. There is no belt on it so I am only testing the clutch engagement by turning the compressor shaft/pulley with my hand.

Any thoughts on what is disabling the AC? My first thought is that it could be a pressure switch or some other diagnostic signal that is preventing the relay from picking up.

All AC related fuses ring out okay. No OBD codes.

Thanks!

How much gas is in the A/C system?