The average HVAC repair costs $150 to $500 for common fixes like a capacitor swap, refrigerant recharge, or thermostat replacement. A compressor failure — the worst-case scenario — runs $1,500 to $3,500. Where you land in that range depends on what broke, how old your system is, and where you live.
This guide covers every major repair type with real 2026 pricing, plus a straight answer on the question most homeowners avoid until it's too late: at what point does repair stop making sense and replacement become the smarter call?
What You Pay Before the Tech Even Touches Anything: The Service Call Fee
Before a technician diagnoses your system, most companies charge a service or diagnostic fee. In 2026, that runs $75 to $200 for most residential companies. Some call it a "trip charge," others fold it into the first hour of labor.
The important thing to know: most reputable companies will credit that fee against the cost of the repair. So if your diagnostic fee is $100 and the repair comes to $300, you pay $300 total — not $400. Ask about this before booking. If a company won't credit it, that's not disqualifying, but it's worth knowing upfront.
Emergency and after-hours calls cost more — typically $150 to $350 just to get a tech to your door, on top of parts and labor. Running your AC into the ground during a heat wave on a Friday afternoon is the most expensive way to find out it has a problem.
Common AC Repairs and What They Cost in 2026
Capacitor Replacement: $150–$400
This is the single most common HVAC repair. The run capacitor — a cylindrical component that helps start and run the compressor and fan motors — wears out over time, and heat accelerates that process. In hot climates, capacitors often fail after 5 to 7 years.
Symptoms: The outdoor unit hums loudly but the fan doesn't spin. The system starts, runs briefly, then shuts off. You might hear a clicking sound before it dies.
A capacitor itself costs $10 to $50 as a part. You're paying mostly for the service call and labor. Total cost with everything included: $150 to $400. If caught early, it's one of the best deals in HVAC repair. Left unaddressed, a failing capacitor puts excessive strain on the compressor — and that turns a $200 repair into a potential $2,500 one.
Refrigerant Leak Detection and Recharge: $200–$1,500
If your system is low on refrigerant, something is leaking — refrigerant doesn't simply "run out." A proper repair means finding the leak, fixing it, and then recharging the system. A company that just adds refrigerant without finding the source of the leak is doing you a disservice; you'll be back in the same situation within a season.
Refrigerant prices have risen meaningfully in 2026. R-410A — the refrigerant in most systems installed before 2025 — is being phased out under the AIM Act. Contractor-installed pricing currently runs $30 to $75 per pound, and most residential systems need 2 to 5 pounds per ton of capacity for a full recharge.
Minor leaks (accessible coil, small leak): $200–$500 total
Moderate leaks (more involved detection and repair): $500–$1,000
Evaporator or condenser coil replacement (severe leak or damaged coil): $1,200–$2,500
If a technician tells you the evaporator coil has a pinhole leak that can't be repaired, get a second opinion before agreeing to a coil replacement on a system over 10 years old. At that point, replacement of the full system often makes more financial sense.
Compressor Replacement: $1,500–$3,500
The compressor is the heart of your cooling system — a refrigerant pump that lives inside the outdoor unit. When it fails, your system blows air but provides no cooling at all. Compressors can fail due to electrical problems, refrigerant issues, lack of maintenance, or just age.
A new compressor (parts only) runs $500 to $1,500 depending on the brand and tonnage. Labor adds another $400 to $1,000. Total cost: $1,500 to $3,500.
Here's the practical reality: if your system is 10 or more years old and the compressor has failed, you're usually better off replacing the whole system. A new compressor on an aging system still leaves you with an aging system. The condenser, evaporator coil, and refrigerant lines are all worn to the same degree. Many techs won't even warranty compressor work on a system over 12 years old for this reason.
Blower Motor Replacement: $400–$900
The blower motor drives the indoor air handler — the fan that pushes conditioned air through your ductwork. When it fails, you get no airflow, even if the rest of the system is working.
Standard single-speed motors run $50 to $150 as parts. Variable-speed ECM motors (found in higher-efficiency systems) cost $200 to $450 and are more labor-intensive to replace. Total with labor: $400 to $900 for most residential systems.
Thermostat Replacement: $150–$600
A failed thermostat is often misdiagnosed — many homeowners assume the HVAC system is broken when the thermostat is the actual culprit. A basic programmable thermostat runs $30 to $80 as a part. Smart thermostats (Nest, Ecobee, Honeywell T6 Pro) run $150 to $250.
Total installed cost:
- Basic programmable: $150 to $250
- Smart thermostat: $300 to $600
Smart thermostats are worth the premium if you don't already have one. The energy savings alone — typically 10 to 15% on heating and cooling bills — pay back the installation cost within 1 to 2 years in most climates.
Drain Line Clog: $75–$250
Central air conditioners produce condensate as they run. That moisture drains out through a PVC drain line. When algae, debris, or sludge blocks the line, water backs up and can cause the system to shut off — or worse, overflow into your ceiling.
This is the lowest-stakes repair on this list. A tech will clear the line with a wet/dry vacuum or flush it with a diluted bleach solution. $75 to $250 is a reasonable range. Some companies charge as little as $50 for a straightforward flush during a service call.
You can prevent this yourself: once a year, pour a cup of diluted white vinegar down the condensate drain access point (the capped PVC pipe near your indoor air handler). Takes 30 seconds and costs nothing.
Furnace Repair Costs
Igniter Replacement: $150–$350
The hot surface igniter is the most commonly replaced furnace part — it's the component that lights the gas burner. Igniters are fragile and wear out over time. A replacement igniter is $30 to $75 as a part; labor brings the total to $150 to $350.
Heat Exchanger Replacement: $1,500–$4,000
A cracked heat exchanger is serious. It's the component that separates combustion gases from the air circulating through your home. A crack can allow carbon monoxide to enter your living space. Repair or replacement is not optional.
The heat exchanger itself is expensive ($600 to $1,500 as a part), and it requires significant disassembly to access. Total cost runs $1,500 to $4,000. On a furnace over 15 years old, this is almost always a situation where replacing the furnace makes more sense than repairing it.
Gas Valve or Control Board Replacement: $300–$900
Control boards and gas valves are mid-range repairs. A gas valve runs $200 to $500 in parts; a control board runs $150 to $450. Add labor, and you're looking at $300 to $900 for either repair.
What Drives HVAC Repair Costs Higher or Lower
Location: Techs in Phoenix, South Florida, and Houston work in some of the most competitive and highest-volume HVAC markets in the country. Labor rates in California and the Northeast tend to run higher than national averages.
Time of year: Summer repairs are more expensive — demand peaks in June, July, and August. If you can schedule maintenance in spring or fall, you'll often wait less and pay less.
Age of the system: Older equipment requires more diagnostic time. Parts for discontinued models can be hard to source and cost more.
Brand and equipment tier: Premium brands (Carrier, Trane, Lennox) use proprietary parts that cost more than commodity components for mid-tier brands.
Emergency service: After-hours, weekend, and holiday calls add $100 to $250 to whatever the repair itself costs.
Repair vs. Replace: Two Rules That Actually Work
The $5,000 Rule
Multiply the system's age (in years) by the cost of the proposed repair. If the result exceeds $5,000, replacement is usually the better financial decision.
Example: 12-year-old system, $350 compressor repair quote — $4,200. Lean toward repair.
Example: 12-year-old system, $500 compressor repair quote — $6,000. Lean toward replacement.
The 50% Rule
If the repair costs more than 50% of what a new system would cost, lean toward replacement. A new 2-ton central AC system with installation runs $3,500 to $6,000 depending on efficiency tier and region. If a repair quote is coming in at $2,500 or more on a system that's already 10+ years old, that 50% threshold is in play.
Neither rule is absolute. A 14-year-old system with a $250 capacitor repair is obviously worth fixing — the math on that is easy. The harder decisions are the middle cases: a $900 blower motor on an 11-year-old system. In those situations, ask the technician directly: "What's the honest condition of the rest of this system?" A good tech will tell you.
How to Avoid Overpaying
Get two quotes for any repair over $500. Parts prices are largely fixed, but labor rates and markup on parts vary by company. A second opinion on a compressor replacement has saved homeowners hundreds of dollars regularly.
Ask if the diagnostic fee is credited toward the repair. Most reputable shops do this. Some don't.
Ask about the warranty on parts and labor. A 1-year parts and labor warranty is standard. Anything shorter is a yellow flag.
Don't agree to a same-day repair on a big-ticket item without sleeping on it. A legitimate company will not pressure you to approve a $2,500 compressor replacement on the spot with no written estimate.
Consider a maintenance agreement. Annual tune-ups cost $70 to $200 per visit. Companies that offer them often include discounts on repairs and priority scheduling for customers on maintenance plans. If you stay in your home for any length of time, this tends to pay for itself.
If you need a repair estimate from a licensed tech in your area, post a service request on HVACJobs.IO. Describe the problem and your system's age, and local technicians will respond with quotes. It's free to post.
Frequently Asked Questions
How much does a typical HVAC repair cost?
Most common HVAC repairs fall between $150 and $900. Capacitor replacements — the single most frequent repair — run $150 to $400. Refrigerant leak repairs range from $200 to $1,500 depending on severity. Compressor replacements are the most expensive common repair at $1,500 to $3,500.
What does an HVAC diagnostic fee cover?
A diagnostic fee ($75 to $200) covers the technician's time to travel to your home, inspect the system, and identify the problem. Most companies credit this fee toward the repair if you hire them to do the work. It does not include parts or repair labor.
Is it better to repair or replace an HVAC system?
Use the $5,000 rule: multiply the system's age by the repair cost. If the result exceeds $5,000, replacement is usually smarter. Also consider that systems over 15 years old are near the end of their lifespan, and refrigerant costs for R-410A systems are rising as the phaseout continues.
How much does it cost to add refrigerant to an AC unit?
Refrigerant recharging alone costs $150 to $400, but a responsible technician won't simply add refrigerant without finding and repairing the leak first. Full leak detection and repair runs $200 to $1,500 depending on where and how severe the leak is.
Why are HVAC repairs so expensive in summer?
Demand is at its peak. Technicians are often booked 3 to 7 days out in late June and July, and companies charge accordingly for emergency and same-day service. Spring tune-ups are the most cost-effective way to catch problems before they become summer emergencies.