Heat pumps are well-suited to Charlotte's climate — mild winters and long cooling seasons make the technology efficient for most of the year. Licensed heat pump contractors in Charlotte service air-source heat pump systems, diagnosing reversing valve failures, refrigerant leaks, defrost cycle issues, and compressor problems. Annual maintenance is important for Charlotte heat pumps given the near-year-round runtime. Installation of a new heat pump system in Charlotte runs $5,500–$13,000. Charlotte's moderate winters mean backup heat strips rarely work hard, but should be tested before cold season. North Carolina requires licensed HVAC contractors for all heat pump service and installation. Contractors here serve Charlotte and the surrounding metro including Concord, Huntersville, Mooresville, Matthews, and Gastonia.