Summer heat can strain cooling equipment, and small issues often become bigger problems if they aren’t handled quickly. Our process starts with airflow checks, refrigerant measurements, electrical testing and thermostat calibration, followed by clear options and upfront pricing. If repair is the best route, we replace failed components and verify performance with temperature and pressure checks. When systems are aging or inefficient, we discuss right-sized replacements to improve comfort and reduce energy use. We also offer seasonal tune-ups that clean coils, check capacitors and tighten connections so your AC runs reliably. Beyond cooling, we service furnaces, heat pumps, ductless mini-splits and indoor air quality upgrades for year-round comfort. With straightforward service and dependable workmanship, Next Day Air & Heating helps hvac cotati homeowners stay comfortable while keeping costs predictable.