Replacing an air conditioner could cost anywhere from $4,350 to $12,095. This covers the cost of labor as well as the cost of the AC unit and installation permit. The following are some of the elements that might influence the cost of replacing your air conditioner:
The system's capacity/power.
Efficiency.
Modifications to any HVAC equipment that you aren't replacing.
Installation expenses.
Rebates and tax incentives.