This could be low refrigerant or a bad blend door actuator. I'd start by checking pressures and if you don't work on AC systems for cars then use this link to find a good shop near you.https://repairpal.com/repair-shops
Alex
RepairPal Certified shops can diagnose and repair your 2009 Ford Edge. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.