I am wondering if anyone out there knows what the air conditioning operating pressures should be (high side and low side) in a properly charged system. I know they will vary some due to ambient temperature, but I'm looking for a baseline.

 

Don't know if this will be of any help but my brother, his boss &amp; I just recharged my '95 K2500 Sub's AC yesterday afternoon &amp; my brother's boss said that low side pressure should be around 30 &amp; high side btwn 250-300. Hopefully someone else will chime in.<br>

 

you might get more replys out of the &quot;other&quot; threads, or if you are doing it currently try the &quot;help&quot; thread

 

Depending on the system High will be 250-350 psi and low 30 psi when the compressor is engaged to 70 psi not engaged.