Top-Rated HVAC Services in San Marcos, CA 92069 - Thompson Heating & Air Conditioning

San Marcos experiences a range of temperatures, and an improperly sized system can't keep up efficiently. An oversized unit will short-cycle, wasting energy and failing to properly dehumidify your home, while an undersized unit will run constantly, struggling to maintain comfort. Our technicians perform precise Manual J load calculations to ensure your new system is perfectly sized for your home's unique layout, insulation, and local climate, maximizing efficiency and comfort.

Common signs include reduced cooling power, longer run times, ice forming on the refrigerant lines or evaporator coil, and a noticeable hissing sound. In San Marcos' heat, a leak significantly reduces your system's efficiency and strains its components, leading to higher bills and potential failure. More importantly, refrigerant is essential for the cooling process and must be handled by professionals. We can safely locate the leak, perform an EPA-compliant repair, and restore your system to its proper charge.

The best prevention is professional, expert installation and maintenance. Always insist on a proper load calculation before installing a new system—this is our standard practice. For existing systems, schedule annual maintenance with us. During a tune-up, we check refrigerant levels, inspect for leaks, clean components, and ensure everything is operating correctly. This proactive care helps catch small problems before they become major repairs and keeps your system running efficiently through every San Marcos season.