Summary: Not sure whether to repair or replace your aging HVAC system? We break down the key factors — age, efficiency, repair costs, and more — to help you make the right financial decision.
The Age Factor
Most HVAC systems have the following expected lifespans with proper maintenance:
- Central AC: 15–20 years
- Gas furnace: 20–30 years
- Heat pump: 15–20 years
- Boiler: 20–35 years
Once a system passes these thresholds, the risk of breakdowns increases dramatically and parts become harder to source.
The 50% Rule
If the cost of a repair exceeds 50% of the cost of a new system, replacement is almost always the better choice financially — especially if the unit is more than 10 years old.
Efficiency Gains Worth Considering
An AC from 2005 might be 10 SEER rated. Modern units must be at least 14 SEER2 (roughly equivalent to 16 SEER). High-efficiency units reach 20+ SEER2. Upgrading an old 10-SEER unit to a 20-SEER unit cuts cooling energy use in half.
Signs It's Time to Replace
- Frequent repairs more than once per season
- Dramatically rising energy bills despite servicing
- System uses R-22 refrigerant (discontinued since 2020)
- Uneven temperatures throughout home
- Compressor has failed (often more economical to replace the system)
Chicago Service HVAC offers a no-pressure consultation where we assess your current system and give you an honest repair vs. replace recommendation. Call {PHONE}.
Need Professional HVAC Help?
Chicago Service HVAC's NATE-certified technicians are ready to help. Same-day appointments available.
Call (773) 231-8486