Diagnose, repair, maintain, and service a wide variety of residential HVAC equipment, including heat pumps, mini-splits, condensers, gas & oil furnaces, water heaters (electric, gas, oil, tankless), and boilers (such as Viessmann, Buderus, and Burnham). Interact directly with residential customers in a professional, courteous manner, providing clear explanations of repairs and identifying opportunities for system upgrades or replacements.