Repair vs. Replace Decision Framework
Use the 5,000 rule first: system age × repair cost. If the result exceeds $5,000, lean toward replacement. Then check these factors.
| Factor | Repair | Replace | Why It Matters |
|---|---|---|---|
| System age | Under 10 years | Over 15 years | Heat pumps: replace at 12–15 yrs; gas furnaces: 20–25 yrs is full lifespan |
| Repair cost vs. system value | Under 50% of replacement cost | Over 50% of replacement cost | "$5,000 system × 50% rule" = walk away from any repair over $2,500 |
| R-22 refrigerant (Freon) | System uses R-410A | System uses R-22 | R-22 was banned Jan 2020; refrigerant costs $100–$200+/lb now vs. $15 before |
| SEER rating | SEER 16+ (modern) | SEER 10 or below | New systems must be SEER2 14+ (South) or 13+ (North); upgrading saves 20–40% on cooling bills |
| Repair frequency | First or second repair | Third+ repair in 5 years | Compressor failures in particular rarely occur in isolation — more follow |
2026 HVAC Service Price Ranges
| Service | Low | High | Notes |
|---|---|---|---|
| AC Tune-Up / Maintenance | $75 | $200 | Annual; prevents most breakdowns |
| Refrigerant Recharge (R-410A) | $200 | $600 | Includes leak diagnosis; if leak found, add $300–$800 for repair |
| Capacitor Replacement | $150 | $350 | Most common AC repair; DIY-able but electrical risk |
| Contactor Replacement | $150 | $350 | Often replaced alongside capacitor |
| Blower Motor Replacement | $400 | $1,500 | Higher end for variable-speed ECM motors |
| Compressor Replacement | $1,200 | $2,800 | If over 8 years old, replace system instead |
| Full AC Unit Replacement (2–5 ton) | $3,800 | $7,500 | Equipment + installation; high-efficiency adds $1,000–$2,000 |
| Full HVAC System (AC + furnace + coil) | $6,500 | $14,000 | Full replacement; geothermal runs $15,000–$30,000 |
Red Flags to Watch For
- ✕Quotes refrigerant recharge without finding and fixing the leak first
- ✕Recommends full system replacement on a system under 8 years old without documenting compressor failure
- ✕Can't provide NATE certification or state license number
- ✕Charges a diagnosis fee but won't apply it toward the repair
- ✕Pushes a maintenance contract as a condition of the repair
- ✕Quote doesn't specify brand, SEER rating, or model number for replacement equipment
Frequently Asked Questions
When should I repair vs. replace my HVAC system?
Use the '5,000 rule': multiply the system's age by the repair cost. If the result exceeds $5,000, replace it. Example: 12-year-old system needing a $450 repair = 12 × 450 = $5,400 → replace. A 5-year-old system with the same repair = 5 × 450 = $2,250 → repair. Also replace immediately if the system uses R-22 refrigerant (banned in 2020) or has a SEER rating below 13.
Why is my AC running but not cooling?
The three most common causes are: low refrigerant (due to a leak — recharge without fixing the leak is a temporary fix), a failed capacitor (the most common single-point failure, typically $150–$350 to fix), or a dirty evaporator or condenser coil restricting airflow. A legitimate HVAC tech will diagnose the root cause before recommending a fix.
How much does AC replacement cost in 2026?
A standard central AC unit replacement (equipment + installation, 2.5–3 ton for a 1,500–2,000 sq ft home) runs $3,800–$7,500. A full HVAC system replacement (AC + gas furnace + evaporator coil) runs $6,500–$14,000. High-efficiency systems (SEER2 18+) add $1,000–$2,500 but qualify for the federal 25C tax credit (up to $600 for AC, $600 for furnace).
What is the 25C tax credit for HVAC in 2026?
The Inflation Reduction Act's 25C credit covers 30% of the cost (up to $600 per category per year) for qualifying high-efficiency HVAC equipment. Qualifying equipment includes: central AC (SEER2 16+ in South, 15.2+ in North), heat pumps (EER2 10+), gas furnaces (AFUE 97%), and air handlers. Ask your contractor for the Consortium for Energy Efficiency (CEE) tier rating before purchasing.
How often should HVAC systems be serviced?
Twice a year: once in spring before cooling season (AC tune-up) and once in fall before heating season (furnace tune-up). Each visit should include coil cleaning, refrigerant level check, filter replacement, electrical connection tightening, and thermostat calibration. Systems that skip annual maintenance void most manufacturer warranties.
Find Pre-Vetted HVAC Contractors Near You
Every contractor in our directory has been reviewed for licensing and NATE certification where available.