What is the average cost to replace a central AC unit?

Replacing a central air conditioning unit in a residential home typically costs between four thousand and ten thousand dollars, with the national average hovering around six thousand dollars including equipment, parts, and professional labor. The final price varies based on several critical factors, including the cooling tonnage capacity required for your home size, the SEER energy efficiency rating, whether you need to replace the indoor evaporator coil and refrigerant lines simultaneously, and the complexity of the installation labor. Premium multi-stage or variable-speed systems from top-tier brands cost significantly more than standard single-stage units. You can evaluate pricing by obtaining multiple written estimates from licensed HVAC contractors. You can verify fair market value when itemized quotes clearly separate equipment costs from labor and warranty coverage.