Guide
Repair or replace your HVAC?
A contractor wants $X to fix it — smart money or throwing good money after old equipment? The simple rule, plus the factors that override it.
The $5,000 rule
Multiply the age of the system (years) by the repair quote ($). If the result is over $5,000, replacing usually beats repairing. A 12-year-old unit with an $800 repair = $9,600 → replace; a 5-year-old unit with a $300 repair = $1,500 → fix it.
Also lean toward replacing if…
| The system is 12–15+ years old | near end of life |
| The repair is a major component (compressor, coil, heat exchanger) | often not worth it on an old unit |
| It still uses R-22 refrigerant | R-22 is phased out & expensive |
| A safety issue (cracked heat exchanger, CO risk) | replace regardless |
When repair is the smart call
A young system (under ~8 years), a small repair, no safety flag, and good efficiency — fix it and keep going. Don't let a contractor scare you into a replacement an honest Manual J and these numbers don't justify.
Run your numbers
More buyer guides
Is your HVAC quote fair? →
What HVAC equipment actually costs (price index) →
Brand price comparisons →
HVAC terms in plain English →
What size HVAC do I need? →
Heat pump vs. AC — should you switch? →
Repair or replace your HVAC? →
HVAC rebates & tax credits →