need some advice
 

New guy here, I couldn't really find a fitting forum for this so go easy on me. I need to replace the expansion valve in a 1996 Camry LE due to "sticking" issues. Does anyone know if this can be done on my own and if so, where can I get a guide to replacing it? If not, where can it be taken to to be fixed at a reasonable price in the D/FW metroplex of Texas?