How do I prepare my HVAC system for summer?

Schedule a professional AC tune-up in early spring. Replace or clean the air filter and check refrigerant levels. Clear debris from the outdoor condenser unit and trim vegetation at least two feet away. Ensure all supply vents and return registers are open and unobstructed. Test your thermostat and replace batteries if needed. Inspect the condensate drain line for clogs. Check attic insulation and seal any new air leaks.