HVAC Repair Cost Calculator
An HVAC repair runs about $259 in Atlanta — $148 to $369 — for the commonest fault of all, a failed capacitor on a split system. Across all 9 faults this model prices, the range is $259 to $2,755. ⚠️ Repairing is cheaper than replacing today in every one of them, which is why this page compares cost per year of system bought instead: $43 against $531.
Estimate the cost for your home
Estimated cost of the repair
$261
typical · range $150 to $371 · 1 trade hours · equipment 12 years old · repairing stops paying at 18
A capacitor is a part worth tens of dollars and the commonest reason an air conditioner hums without starting. ⚠️ It is also the fault most often used to open a replacement conversation. Ask to be shown the failed part — a failed capacitor usually has a bulging top — and if the diagnosis arrives attached to a quote for a new system, get a second opinion first.
Labour priced at national wages. Enter a ZIP code to price it for your area. 77% of this figure comes from modelled material prices — each line shows its own uncertainty.
Priced from bls.gov Aug 2026how every line is sourced
The one input that changes the answer for you.
The cheapest real fault there is and by far the most common reason an air conditioner hums but will not start. A capacitor is a part worth tens of dollars. ⚠️ It is also the fault most often used to sell a system: if somebody diagnoses a failed capacitor and the conversation turns immediately to replacement, get a second opinion before agreeing to anything.
The commonest American arrangement and what this model is calibrated on: an air conditioner outside and a gas furnace inside sharing the same ductwork.
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The figure above is already calculated. Each step just makes it more yours, and you can stop at any of them.
The $5,000 rule, and what it gets wrong
| Fault | Repair | The rule says | The arithmetic says |
|---|---|---|---|
| Start or run capacitor has failed | $261 | repair | repair |
| Contactor is pitted or stuck | $280 | repair | repair |
| Thermostat has failed or is wired wrong | $401 | repair | repair |
| Control board has failed | $751 | replace | repair ⚠️ |
| Blower motor has failed | $840 | replace | repair ⚠️ |
| Refrigerant leak, found and repaired | $915 | replace | repair ⚠️ |
| Evaporator coil has to be replaced | $1,952 | replace | repair ⚠️ |
| Cracked heat exchanger in the furnace⚠️ not a money decision | $2,312 | replace | replace, on safety |
| Compressor has failed | $2,771 | replace | repair ⚠️ |
The rule people are told is to multiply the age of the equipment by the repair quote and replace if the product exceeds $5,000. On this equipment that is 12 × $261 = $3,128. The two columns disagree on 5 of the 9 faults, and the reason is that the rule does not know what a new system costs where you live — it gives the same verdict whether replacement is $9,340 or double that. ⚠️ Our column is not gospel either, and here are its two weaknesses stated plainly. It assumes the repaired system reaches its remaining design life, which after a compressor failure on a twelve-year-old machine is the optimistic case. And one row is not arithmetic at all: a cracked heat exchanger says replace, on safety, because the money never gets a vote on carbon monoxide. Read the rest as two rough guides that disagree, and let the disagreement be the reason to get a second quote rather than a reason to trust either.
Cost per year of system bought
| Repair — buys 6 more years | $43/yr | $261 |
|---|---|---|
| A new system — buys 18 | $519/yr | $9,340 |
| This repair stops paying when the system is | — | 18 years old |
Both figures come from models on this site at the same BLS wages — the replacement from our HVAC replacement page. ⚠️ Two things this table cannot see and you can. First, whether the system uses R-22: production and import of it ended under the EPA phaseout, so opening the refrigerant circuit on an old system means recovered refrigerant at a price unrelated to what it once cost, and a leak that is recharged will leak again. Tick the box and watch this figure move. Second, whether this is the first failure or the third — a system that has needed something every summer is telling you where it is in its life more clearly than any rule of thumb.
| Line item | Qty | Cost | Source |
|---|---|---|---|
| Diagnostic call-out1 call-out × urgency | 1each | $75–$220 | estimated±49% |
| Parts — Start or run capacitor has failed1 for this fault | 1each | $18–$90 | estimated±67% |
| Start or run capacitor has failed — labour1 hours × system factor × urgency | 1hour | $57–$61 | sourced |
| Total | $150–$371 | ±42% |
Where these numbers come from
- The $5,000 rule, tested rather than repeated
- The rule is everywhere: multiply the age of the equipment by the repair quote and replace if the answer is over $5,000. It is easy to apply and it has a flaw that never gets said — it does not know what a new system costs where you live. It returns the same verdict whether replacing is $9,551 or twice that, and replacement cost is exactly what the decision turns on. So this page runs both: the rule, and cost per year of system bought using our own replacement model at the same wages. They disagree on 5 of the 9 faults, always with the rule saying replace while the arithmetic still says repair. ⚠️ And our column has its own weakness, stated because a number without its weakness is worse than no number: it assumes the repaired system reaches its remaining design life, which after a compressor failure on a twelve-year-old machine is the optimistic case. One row is not arithmetic at all — a cracked heat exchanger says replace on safety, and the money never gets a vote.
- Refrigerant is not a consumable, and R-22 is not made any more
- ⚠️ The single most useful thing on this page for anybody who has been told their system is “low on refrigerant”: refrigerant is not consumed, so a system that is low has a leak. Topping it up without finding the leak is paying to fill something that will empty again, and it is one of the commonest bills that buys nothing. Ask for the leak to be found and named, not just for a charge — that is why this model prices the fault as $908 for finding and repairing rather than as a refill. The federal rules are real and worth knowing you are covered by: EPA, Stationary Refrigeration and Air Conditioning (Section 608) (retrieved 2026-08-24) governs who may handle refrigerant and requires recovery rather than venting. And on old equipment there is a second number: EPA, Phaseout of class II ozone-depleting substances (retrieved 2026-08-24) sets out the phaseout schedule, under which no HCFC-22 has been produced or imported since 2020. Servicing continues on recovered refrigerant, at a price unrelated to what it once cost — which is why the same compressor is $2,755 on a modern system and $3,755 on an R-22 one.
- The one fault that is not about money
- Every other row on this page is a calculation. A cracked heat exchanger is not. ⚠️ A heat exchanger is the metal wall between the burner flame and the air your house breathes, and a crack in it can put combustion products, including carbon monoxide, on the wrong side of that wall. A technician who finds one should red-tag the furnace and shut it off, and on almost any system old enough to have cracked one the answer is a new furnace rather than a repair. If somebody offers to weld it, get somebody else. The calculator prices the work because people want to know the size of the number, and it labels the verdict “replace, on safety” rather than letting the arithmetic answer. CPSC, Carbon Monoxide Information Center (retrieved 2026-08-24) is the federal starting point, and the practical version is shorter: if your house burns anything — gas, oil, wood — it needs working carbon monoxide alarms, and they are the cheapest line item anywhere on this site.
- What moves the price, and where the numbers come from
- Three things move it and only one is the part. The system type lands on the hours rather than the components — $259 on a split system against $276 on a packaged rooftop unit, because a compressor on a roof is a very different afternoon. Out of hours is a premium rather than a rate: $402 for the same job that costs $259 on a Tuesday. And age moves nothing about the repair and everything about whether to buy it. Wages are official — BLS OEWS for heating and air conditioning mechanics, May 2025, retrieved 2026-08-20, adjusted to your metro area and benefit-loaded from BLS ECEC. ⚠️ 78% of the total is estimated rather than official, with every band and its reasoning on the dataset page. Replacement figures come from our HVAC replacement cost calculator, and the whole method is on the method page.
- Material prices
- Modelled estimates, not sourced prices. No public, machine-readable source of US residential material prices exists, and we would rather say so than pretend otherwise. Each line carries its own uncertainty band. How we estimate them.
Contractor overhead and profit applied at 33–43% over direct cost. Data last reviewed 2026-08-24.
What this figure does not include
- A new system
- Priced on our HVAC replacement, furnace, air conditioner and heat pump pages, and compared against this repair above. The comparison is the point of this page, and it is a calculation rather than an opinion.
- Ductwork
- A system that never cooled the back bedroom properly is often a duct problem rather than an equipment problem, and no repair on this page fixes it. Our ductwork replacement page prices that side of it.
- What your warranty covers
- ⚠️ Worth checking before agreeing to anything: many systems carry a ten-year parts warranty that survives a change of owner if it was registered, and it usually covers the part and not the labour. That distinction is exactly where a quote can be misread, so ask which half you are being charged for.
- Whether the system was the right size to begin with
- An oversized system short-cycles and wears out its own contactor and compressor; an undersized one runs constantly. Neither is a fault and neither is repairable — it is a sizing question that only gets answered when the system is replaced.
- Air quality equipment
- Filters, purifiers and humidifiers attached to the system are separate items and are frequently sold during a repair visit. Some are worth it. None of them fix the fault you called about.
Questions people actually ask
What is the $5000 rule for HVAC?
Multiply the age of the equipment by the repair quote and replace if the product is over $5,000. On a 12-year-old system with this repair that is $3,104. ⚠️ It has a flaw nobody mentions: the rule does not know what a new system costs where you live, so it gives the same verdict whether replacement is $9,551 or double that. This page runs it against our own replacement model at the same wages, and the two disagree on 5 of the 9 faults — every time in the direction of the rule saying replace when the arithmetic still says repair. Our column is not gospel either: it assumes the repaired system reaches its remaining design life, which after a compressor failure is optimistic.
Is it cheaper to repair or replace HVAC?
Repairing is cheaper today for every fault on this page — $259 to $2,755 against $9,551 for a new system in Atlanta — so the useful question is cost per year of system bought. This repair works out at $43 a year against $531 for replacement. ⚠️ Where it flips is the expensive faults on old equipment: a compressor at $2,755 stops paying at 13 years, and the same compressor on an R-22 system costs $3,755 and flips sooner. Two things the arithmetic cannot see: whether this is the first failure or the third, and a cracked heat exchanger, which is not a money decision at all.
What's the average lifespan of an HVAC system?
This model uses 18 years of design life, which is a declared assumption rather than a measurement — real equipment varies enormously with climate, run hours and whether anybody ever cleaned the coil. ⚠️ What matters more than the average is where yours is on the curve, and the honest signal is not age but frequency: a system that has needed something every summer for three summers is telling you where it is more clearly than any number. Lifespan is also what makes the arithmetic on this page work: repairing buys the years that are left, so the same repair is good value at eight years and poor value at fifteen.
How much is a new AC unit for a 2000 sq ft house?
About $9,551 in Atlanta on our own replacement model — that is the figure this page compares every repair against, and our HVAC replacement calculator prices it properly by house rather than by a single average. ⚠️ Be careful with the question though, because it hides the commonest expensive mistake: replacing only the outdoor unit. An air conditioner is a matched pair, and a new condenser working against a ten-year-old indoor coil gives you neither the efficiency you paid for nor a warranty that covers much. If a quote replaces half a system, ask what the other half is doing.
Taken from Google’s “people also ask” results for this search on 2026-08-24, not invented.
Other cost calculators
The first of these are the jobs closest to this one — the ones that turn up in the same quote, or instead of it.
- Furnace replacement cost
Separates what a condensing furnace costs from what it forces you to build around it, including the chimney liner your water heater suddenly needs.
- Air conditioner replacement cost
Works out the cheapest unit federal law lets you install where you live, which is higher in twenty-two states and territories, and prices it.
- Roof inspection cost
Prices five ways of looking at a roof, says what a free inspection is really buying you, and calculates where patching stops paying against a new roof.
- Garage door installation cost
A new door rarely weighs what the old one did, so the springs have to be sized to it. This shows what a «door only» quote leaves out.
- The full hvac repair cost dataset
Every unit price, every quantity rule and the reasoning behind each estimate, as a plain table.
- How we calculate
The formula, the sources, and an honest account of which parts of the model are weak.