Ac didnt work in my dodge when i bought it, i went to fill it will proper amount of freon. 0,850kg as it says on the sticker. It was totally empty.

After flling, compressor engages and it makes cold inside but the compressor runs and runs all the time. After 370psi in high side i stopped the compressor, i thought it would disengage at about 250psi?

Should the fan clutch engage always when ac is on at idle? Fan turns very slowly at idle so clutch is not working? This should also help with pressure when it cools the condenser? Or is there pressure sensor for high pressure?