HVAC Replacement & Repair Cost (2026)
By the Home Repair One data team · Updated July 2026 · Ranges from our estimator engine
Short answer: In 2026, an AC repair typically runs $375–$550 and a furnace repair $400–$600. A full system replacement spans $5,250–$29,000, driven by tonnage and SEER2. A small standard-efficiency system starts near $5,250. An average 3.5-ton job lands about $7,250–$10,750. Large or premium heat pumps can reach $29,000. A single-zone mini-split starts near $2,600. A seasonal tune-up is $100–$150. Age still drives repair versus replace: a cheap fix on a young unit is worth it, a compressor on an old one usually is not.
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HVAC repair vs. replacement cost
An AC repair typically runs $375–$550. A furnace repair typically runs $400–$600. A refrigerant leak, compressor, or heat-exchanger failure costs much more and is where replacement math kicks in.
A useful rule: if the repair costs more than about a third of a new system and the unit is over 10–12 years old, replacement usually wins on total cost. A newer unit with a cheap fix is worth repairing.
HVAC prices by job
Here are 2026 national ranges across common heating and cooling work, computed from our cost model. Run the estimator for a range tuned to your home size and ZIP.
| Job | Typical range |
|---|---|
| System replacement | $5,250–$29,000 |
| Mini-split install | $2,600–$18,500 |
| AC repair | $375–$550 |
| Furnace repair | $400–$600 |
| Tune-up / maintenance | $100–$150 |
What a new system really costs
A full replacement is priced mainly by tonnage (home size) and efficiency (SEER2). A high-efficiency or variable-speed system costs more up front but runs cheaper, and in hot climates with long cooling seasons that pays back, in milder climates the payback is slower.
Insist on a load calculation rather than a like-for-like swap; an oversized system short-cycles and an undersized one never keeps up.
What changes your price
- Home size / tonnage, the base driver of a replacement.
- Efficiency tier (SEER2), high-efficiency costs more up front, less to run.
- Straight AC versus heat pump versus full system.
- Ductwork condition and any code upgrades triggered by the swap.
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FAQ
How much does it cost to replace an HVAC system?
A small standard-efficiency system starts near $5,250. An average 3.5-ton job lands about $7,250–$10,750. Large or premium heat-pump systems can reach $29,000. Our estimator ranges it by square footage and efficiency.
Should I repair or replace my HVAC?
If the unit is under 10 years old and the fix is minor, repair. If it's older and needs a major part like a compressor or coil, putting that money toward a new system usually wins.
How long does an HVAC system last?
A well-maintained AC or furnace lasts about 15–20 years, heat pumps a bit less in heavy-use climates. Annual tune-ups and clean filters meaningfully extend that life.