Expansion Block/Orifice Tube: Service Precautions
A/C EVAPORATOR CORE ORIFICEThe A/C evaporator core orifice should be replaced whenever the A/C compressor is replaced for lack of performance (internal damage).
The A/C evaporator core orifice, located in the condenser to evaporator tube, cannot be serviced in detail as a component of the line. If replacement is necessary, perform the procedure outlined for Liquid Line Removal and Installation.
An orifice tube replacement service kit may be used as an optional service procedure.