2007 caliber has freon in it new pressure switch the compressor doesn't have a clutch I keep getting low and high pressure errors even though it is at the right level

 

I think it has a clutch, but it uses internal valving to regulate the pressure/temp, instead of cycling the clutch like most vehicles do. I know you can tell when the compressor kicks in on our 09 by the rpm and it vibrates a little more at idle with the a/c turned on.

 

please explain what a low and high pressure error is? You have manifold gauges and are measuring high and low pressures? if you have static and running pressures, post them.

did you fill the system with a can or ac charging machine. CAN filling is not accurate.