Once the old unit has been removed, it’s time to install the AC unit replacement. This portion of the work may involve replacing piping or electrical and ductwork connections, if the hookups differ in any way. Electrical connections are checked, and refrigerant is added to the system per the manufacturer’s instructions at this time, as well.

After all this has been completed, the technician will connect your new air conditioner and test it to ensure everything is working the way it should. If it passes the test, this is usually when a new thermostat is installed or the existing one checked. After a final check to make sure your new AC system is in good working order, you should receive a few reminders about proper maintenance services.