The thermostat is set, the fan is running, and the living room still feels warmer than it should. Before the next stretch of hot weather, it is worth finding out whether your central air conditioner needs a routine repair, a closer inspection, or a replacement plan.

Your system’s age is a useful place to start, but age alone does not decide replacement. Its repair history, cooling performance, and the work included in a new installation matter too. Choose an age range below to find a practical starting point for your situation.