Annual HVAC maintenance in Dallas is one of the highest-value preventive investments a homeowner can make given the DFW area's demanding two-season climate. Schedule AC maintenance in March before Dallas's peak cooling season — contractors book out quickly from April onward. Fall heating checks in October are equally important: Dallas ice storms are rare but severe when they occur, and untested heating systems fail at the worst possible time. Maintenance visits cover coil cleaning, refrigerant checks, capacitor condition, condensate drain inspection, and filter replacement. Annual contracts run $150–$375. Texas TDLR-licensed contractors below serve Dallas and the DFW metro including Fort Worth, Plano, Irving, Garland, and Mesquite.