2007 mazda cx7 Expansion valve replacement

Hello, it's attached to the evaporator line underneath the dash. It's a long and difficult job to access the valve. I strongly suggest acquiring a workshop manual to help guide you if you are planning on undertaking this repair. I can't print the details of the procedures here, but a shop technician with all adequate tools and facility would take nearly 3 hours to replace the valve itself, besides discharging then recharging the air conditioning system properly.