Responded to service call for a 2-year-old Lennox HVAC system experiencing refrigerant leakage issues (requiring 3 refills since installation) and an improperly installed mini-split unit. Discussed repair options including leak detection and repair, leak sealer application (noted 50% success rate for small leaks only), or complete system replacement. Customer will contact builder regarding warranty coverage for the leak repair and schedule relocation of the mini-split head unit to the correct position.