Replace your system if it is more than 10 years old and only in average condition, it does not keep you as comfortable as you would like, it breaks down frequently, or you will be living in your home for at least five more years.
Repair your system if it is less than 10 years old and in good condition, your cooling costs have been acceptable, you’re pleased with your level of comfort, its performance is reliable, you will be moving within the next five years, or it is still under warranty.