Climate Control Switches, possibly wiring? I'm not sure if integras had the wiring for it built into all harness's.
A/C Condenser
A/C Accumulator
A/C Pump
A/C Lines
And will probably need charged by a shop. It's not possible to remove all of this from the vehicle without opening a line, releasing any gas from the system. If the system is dry it is possible your accumulator could have gone bad and will need replaced/oiled then charged.