An hvac repair cost calculator helps homeowners decide whether to fix or replace aging equipment. Related searches — furnace repair cost calculator, duct cleaning cost calculator — target specific repair types. Repair economics differ from replacement: the 50% rule says if repair exceeds half the replacement cost on a unit past 75% of its expected life, replace instead.
Common HVAC Repair Costs
| Repair | Typical range | Notes |
|---|---|---|
| Service call / diagnostic | $75 – $200 | Often credited toward repair |
| Capacitor replacement | $150 – $400 | Most common AC failure |
| Contactor replacement | $150 – $350 | AC and heat pump |
| Refrigerant recharge (R-410A) | $200 – $600 | Find leak first — recharge alone is temporary |
| Blower motor | $400 – $1,500 | Depends on ECM vs PSC |
| Compressor replacement | $1,500 – $3,500 | Often triggers replace-vs-repair decision |
| Heat exchanger (furnace) | $1,500 – $3,500 | Safety issue — many units get replaced instead |
| Control board | $300 – $800 | Furnace or air handler |
| Thermostat (installed) | $150 – $400 | Smart stats at high end |
Common HVAC repair cost ranges
Furnace Repair Cost Calculator Inputs
A furnace repair cost calculator should account for:
- Furnace age (15–20 year expected life for gas furnaces)
- Repair type (minor electrical vs major heat exchanger)
- Local labor rate ($75–$150/hr typical)
- Whether parts are still available for discontinued models
Furnace repair cost calculator output is most useful compared against Furnace Replacement Cost — a $2,500 heat exchanger on a 18-year-old unit rarely makes sense.
Duct Cleaning Cost Calculator
A duct cleaning cost calculator estimates $300–$700 for a typical single-family home. Factors:
| Factor | Cost impact |
|---|---|
| Home size | $25–$50 per vent is common pricing |
| Number of vents | 10–20 vents typical |
| Mold or asbestos | Requires remediation specialist — much higher |
| Dryer vent included | +$100–$150 |
EPA does not recommend routine duct cleaning unless you have visible mold, vermin infestation, or excessive debris. See NADCA guidelines before paying for unnecessary service.
Repair vs Replace Decision
If repair cost > 50% of replacement cost AND unit age > 75% of expected life → replaceExample: $1,800 compressor on a 14-year-old 3-ton AC. Replacement runs $4,500–$6,500. Repair is 28–40% of replacement — borderline. At 16+ years, replace.
Repair vs replace decision flow
Use the Free Calculators
HVAC Replacement Cost Calculator — compare repair quote against replacement.
Furnace Replacement Cost Calculator — furnace swap estimate.
FAQ
How much does HVAC repair cost?
Most common repairs (capacitor, contactor, thermostat) run $150–$400 installed. Major repairs (compressor, heat exchanger) run $1,500–$3,500.
Is a furnace repair cost calculator reliable?
It gives range benchmarks. Actual price depends on parts availability, labor market, and whether the unit is under warranty.
How much does duct cleaning cost?
$300–$700 for a typical home with 12–15 vents. Larger homes or commercial systems cost more.
When should I stop repairing and replace?
When repair exceeds 50% of replacement cost on equipment past 75% of expected life, or when the repair is a major component (compressor, heat exchanger) on a unit over 12–15 years old.