A Goodman-branded central air system is often selected for value, which makes it especially important to keep repair spending disciplined. Using 20 years as a conservative expected lifespan, it's usually reasonable to repair predictable service parts (capacitors, contactors, fan motors) when the system is early or mid-life and the quote stays under the threshold.
If you're facing major sealed-system work such as a compressor replacement or repeated refrigerant leak repairs, replacement can be safer-particularly if the equipment is older, out of warranty, and has a history of breakdowns. Also weigh comfort and efficiency: newer systems may provide better humidity control and lower operating cost.
The price benchmark here reflects an average installed replacement cost from a national home-services cost guide; actual cost depends on sizing, efficiency rating, and whether ductwork changes are required.