cold air one side warm air the other

[BobbySpeed]

Driver side is blowing fairly cool but passenger side is blowing warm- except on cool days.

Had this problem last year and did an a/c evac and recharge, and a/c blew nice and cold out both sides.

I hear a hissing sound sometimes on the passenger side, and sometimes when a/c is at the coldest setting with fan turned up all the way up there is a kind of ticking rattling sound.

[rpcc]

Have the same situation - but my passenger side works and drivers doesn't.  The dealer needs to take the dash apart to find the busted motor/actuator.  In my case they can't get to the diagnostics because of a short - so its 500 to see what the problem is.  

[wvicary]

Have the pressure in the system check and the climate control scanned for fault codes.