Decision guide
Your Air Conditioner Stopped Working: Repair It, Replace It, or Switch to a Heat Pump
By Advanced Ductless · Published · Last verified
Short answer
There is no rebate for repairing your air conditioner. There is a rebate for replacing it with a heat pump. In Massachusetts that is worth $2,000 per ton for a qualifying commercial air source heat pump installation, and up to $8,500 for a residential whole-home system. Nothing comparable exists for a repair, at any age, for any fault.
That asymmetry matters most at the exact moment your system fails, because a failed air conditioner is the cheapest point in the entire lifecycle to switch. The removal, the electrical work, the line set and the permit are costs you are paying either way. The marginal cost of getting heating as well as cooling is smaller than most people expect, and the rebate applies to the whole job rather than to the difference.
The honest caveat, and the reason to read further: if your system is under about eight years old and the fault is small, repair it. That is the right answer often enough that any page telling you otherwise is selling something. We do not repair other companies’ equipment, so we have no stake in which way you go — this is a decision guide, not a service call.
Should you repair it or replace it?
Most advice on this question is written by companies that sell repairs, and it shows. The useful version is a decision rule you can apply to the quote in your hand, in about a minute.
| Situation | What it usually means |
|---|---|
| Under 8 years old, single minor fault (capacitor, contactor, sensor) | Repair. The equipment has most of its service life left and the rebate does not change that arithmetic. |
| Under 8 years old, compressor or coil failure | Get the repair quote, then compare. A major component on young equipment is worth fixing more often than not, but not always. |
| 8 to 12 years old, major component failure | The genuine grey zone. Compare the repair quote against a replacement quote with the rebate applied. Both numbers, side by side, before deciding. |
| Over 12 years old, any significant repair | Replace. You are buying a short extension on equipment that will need replacing again soon, and paying full price for it. |
| Repair quote approaching a third of replacement cost | Replace, at almost any age past ten years — especially once a rebate offsets the replacement and nothing offsets the repair. |
| Second failure in two seasons | Replace. The specific fault matters less than the pattern at that point. |
Notice what is missing from that table: any dollar figure of ours. Repair pricing varies too much by fault, access and equipment for a published number to help you, and a page that invents one is guessing. The proportional test is the one that survives contact with a real quote.
How old is too old to repair?
Ductless and central cooling equipment in this climate generally gives twelve to fifteen years of service, less if it has been running hard in a commercial space with long hours and heavy occupancy. A salon or restaurant runs its system far harder than a house does, and the equipment ages accordingly.
The reason age dominates the decision is that a repair does not reset it. Replacing a compressor in a fourteen-year-old system gives you a fourteen-year-old system with a new compressor, and every other component in it is the same age as it was yesterday. That is the part the repair-versus-replace framing tends to obscure.
If you do not know how old the system is, the nameplate on the outdoor unit carries a serial number that encodes the manufacture date, and the model number will let you look up whether parts are still produced. Both are worth thirty seconds before you authorise anything.
Does it matter that your system uses R-410A?
It matters for repairs more than most people are told. R-410A has been the standard refrigerant in residential and light commercial cooling equipment for roughly two decades, and the industry is now transitioning away from it toward lower global-warming-potential refrigerants.
You can see that transition in the federal certification data rather than having to take anyone’s word for it. Of 7,384 unique ENERGY STAR certified mini-split outdoor units, 41% are still R-410A, 40% have moved to R-454B and 19% to R-32. New equipment is visibly shifting.
The practical consequence for someone deciding whether to repair: a repair that involves recharging an R-410A system is a bet on the long-term availability and price of a refrigerant the industry is moving away from. That is not a reason to panic, and it is not a reason to replace working equipment. It is a reason to weight the decision toward replacement when the system is already old and the repair is already large.
What we are not telling you: that R-410A equipment is excluded from Mass Save® rebates. We have seen that claim made and we have not been able to verify it against the Qualified Product List, so we are not repeating it. If a contractor tells you your refrigerant disqualifies you from a rebate, ask them to show you where the program says so.
Why is a failed AC the cheapest time to switch?
This is the mechanic nobody local publishes, and it is the strongest argument on this page.
When you replace a dead air conditioner with another air conditioner, you pay for removal and disposal of the old unit, the electrical work, the refrigerant lines, the mounting, the permit and the labour. When you replace it with a heat pump instead, you pay for exactly the same list. Those costs are not the difference between the two options — they are common to both.
What you get for the difference is heating as well as cooling, from equipment that would otherwise sit idle for seven months a year. And the rebate is calculated on the installed system, not on the incremental cost of upgrading. So the public money lands on the whole job while you are only paying the difference.
| Cost of the job | Replace with another AC | Replace with a heat pump |
|---|---|---|
| Removing and disposing of the old unit | Required | Identical |
| Electrical work | Required | Identical |
| Refrigerant lines and mounting | Required | Identical |
| Permit and inspection | Required | Identical |
| Installation labour | Required | Identical |
| The equipment itself | Cools only | Cools and heats — the only line that differs |
| Mass Save® rebate | None | Applies to the installed system |
Five of the seven lines are the same job either way. The difference sits in one row — and the row underneath it is the one that moves the total.
Run that comparison at any other moment in the lifecycle and it looks worse, because you are then paying to remove equipment that still works. The failure is what makes the switch cheap, which is an uncomfortable thing to be grateful for but a real one.
What does Mass Save® pay to replace a broken AC?
It pays for the heat pump, not for the air conditioner. That distinction is the whole point: the program exists to move buildings onto efficient electric heating, so the incentive attaches to the equipment that heats as well as cools.
The rates fork by whether the building is commercial or residential, and the two are set separately. Find your row.
| Commercial | Residential | |
|---|---|---|
| Air source heat pump | $2,000 per ton, for qualifying air source heat pump installations | $2,650 per ton whole-home, capped at $8,500 · $1,125 per ton partial, capped at $8,500 · $250 per ton for previously unconditioned space, capped at $2,500 |
| Pre-approval | Required since 1 July 2026. The Rebate Commitment Letter is valid four months | Per the residential program terms |
| Ceiling | Total rebate cannot exceed installed cost | Total rebate cannot exceed installed cost |
The commercial pre-approval rule is the one that costs people money. Since 1 July 2026, a commercial project needs approval before equipment is purchased, and the commitment letter that comes back is good for four months. Buy first and you can forfeit the rebate the project was priced around. If you already hold a letter, check its issue date — the clock runs from then, not from when you start the work. We handle that paperwork as part of the job, which is less a favour than a recognition that it is the most common way these projects go wrong.
Full program detail, including what qualifies and how the assessment works, is on our Mass Save® rebates page. If Eversource is your utility, the Eversource page covers the specifics for your account.
One eligibility trap worth knowing. Seventeen Massachusetts towns are served by municipal light plants rather than by the investor-owned utilities that fund Mass Save®, and buildings in them may not be eligible for these incentives at all. Eligibility also depends on the fuel your building currently heats with, not simply on the town. We confirm which incentives apply to your specific building in writing, at no cost, before you commit to anything — and sometimes that answer is that they do not apply.
Does a heat pump cool as well as an air conditioner?
Yes, and the reason is simpler than the marketing on both sides suggests: in cooling mode a heat pump is an air conditioner. Same refrigeration cycle, same direction, sized to your cooling load the same way. Anyone telling you that heat pumps are a heating product that cools as an afterthought is describing equipment from twenty years ago.
There is a real complication, though, and it runs against the advice you will hear from nearly every contractor in this state — including, in a different context, from us.
ENERGY STAR certifies heat pumps down two separate paths. The standard path requires the equipment to clear a cooling-efficiency threshold measured at 95°F, the temperature at which you actually care. The cold-climate path substitutes a higher heating requirement and contains no peak-cooling efficiency requirement at all. The specification says as much in its own words: cold-climate units are the ones “optimized for peak heating and part-load cooling performance.”
So when the whole market tells you to look for cold-climate certification, understand what that label is: it is a heating credential. It is the right credential for a Massachusetts building, where you have a real heating season and the equipment needs to hold capacity at 5°F. But it is not a statement about cooling, and it can be earned while skipping the cooling test.
| Meets cooling-efficiency criterion | Does not | |
|---|---|---|
| Cold-climate certified | 5,027 | 965 |
| Not cold-climate certified | 1,387 | 0 |
Of 7,384 unique certified outdoor units, 965 do not meet the cooling-efficiency criterion — and every single one of them is a cold-climate certified unit. Not one non-cold-climate unit misses it, because on that path it is mandatory.
Read this precisely, because it is easy to overstate. Failing that criterion does not mean a unit cools badly or lacks capacity — it is an efficiency measure, not a capacity rating. Those 965 units cool. Some of them simply draw more power to do it on the hottest days of the year, which shows up on your bill in August rather than in your comfort. We are not telling you to avoid cold-climate equipment. In Massachusetts you want it. We are telling you that the label answers a heating question, and that if cooling cost is what is driving your decision, you should ask for the specific model’s cooling efficiency rather than treating the certification as an answer.
What to do with that: on any quote you receive, ask for the exact model number and look up its certification yourself. Our comparison of AUX and Fujitsu on the certification data works through what that looks like in practice, including where the equipment we most often install comes off worse.
What happens when the new system has a problem?
This is the objection that stops most people from replacing, and it deserves a direct answer rather than a reassuring one.
We service what we install, under warranty. The no-repair policy elsewhere on this page is specifically about other companies’ equipment — we are not going to diagnose an install we did not perform and cannot stand behind. Our own work is a different matter entirely.
We also register your manufacturer warranty for you after the install. That sounds like a small administrative courtesy and it is not. Manufacturer coverage generally depends on the equipment being registered within a limited window after installation, and it is one of the most commonly skipped steps in this industry — the customer assumes the installer did it, the installer assumes the customer will, and neither does. The failure surfaces years later, at the worst possible moment, when someone discovers the coverage they were counting on was never activated. We do it so that cannot happen to you.
On the systems we most commonly install, registered coverage runs twelve years on the compressor and parts. Terms differ by manufacturer, so we confirm the exact figure for the equipment on your quote rather than quoting you a number that might not be the one you get.
Can you finance it?
For Eversource commercial customers, yes. Advanced Ductless is an approved contractor with the National Energy Improvement Fund, which provides the financing arm of the Mass Save® commercial programme. Qualifying small businesses and municipalities can access rates from 0% on projects up to $100,000, with terms from 12 to 48 months, no money down and no collateral.
One thing we want to be straight about, because you will find it in the fine print anyway: NEIF’s own program materials describe the 0% tier as being funded “through reduced incentives.” We are seeking a written answer on exactly what that trade-off costs, and until we have it we are not going to tell you that you receive the full rebate and the 0% rate together. What we will do is show you the net cost both ways on your quote — rebate-maximised, and financing-maximised — so you can pick the one that suits your cash position. For most small businesses that is a more useful conversation than a headline rate anyway.
Details and the application are on the financing page.
What if you are not ready to replace right now?
Then do not. A page that only works if you buy today is not giving you advice.
A few things are genuinely worth knowing about timing. Peak season is the worst time to buy anything in this trade — every contractor in the region is booked, lead times stretch, and you have the least leverage you will have all year. If your system is limping rather than dead, the shoulder seasons in autumn and late winter are when the calendar is open and the work is unhurried.
For a commercial space, there is a second argument for timing it deliberately: the disruption is real, and doing it in your slow month rather than your busy one costs you far less in lost trade than the difference in any quote. Restaurants and salons in particular are usually better off booking a January install than a July emergency.
And if the problem is one room rather than a whole building — a converted attic, a bonus room over a garage, an addition that never had a real solution — that is a smaller job than you probably think. Our single-zone page covers that case specifically.
Summary
- The asymmetry is the whole decision. No rebate exists for repairing an air conditioner. Mass Save® pays $2,000 per ton commercial, or up to $8,500 residential, to install a qualifying heat pump instead.
- Age beats symptom. Under eight years with a small fault, repair. Over twelve years with a large one, replace. In between, get both quotes with the rebate applied and compare them side by side.
- A failure is the cheapest moment to switch, because removal, electrical, line set and permit are costs common to either replacement. The rebate then lands on the whole job rather than on the upgrade.
- Cold-climate certification is a heating credential. 965 of 7,384 certified units skip the cooling-efficiency test, and all 965 are cold-climate certified. They cool; some cost more to run in a heat wave. Ask for the model number and check it.
- Commercial pre-approval has a four-month clock. Buying equipment before the Rebate Commitment Letter is issued can forfeit the rebate entirely, and a letter already in hand expires.
- Installation quality outweighs equipment choice. Sizing, line set and commissioning affect what you actually experience more than the badge on the outdoor unit does. Ask any contractor how they size the system, and be wary of one who answers with a rule of thumb.
- Not every reader should replace anything. A young system with a small fault should be repaired, a building with working ductwork may be better served by a ducted replacement we do not sell, and a municipal-light-plant town may have no Mass Save® eligibility at all.
Frequently Asked Questions
No. We do not service, diagnose or repair equipment installed by another company. We install ductless heat pump systems, and we service what we install under warranty. This page exists because most people searching after a breakdown do not actually need a repair company — they need to know whether the system is worth fixing at all, and what it costs to replace it. That question we can answer honestly, because we have no repair revenue riding on the answer.
No. Mass Save® rebates apply to installing qualifying high-efficiency equipment, not to repairing existing equipment. That asymmetry is the single most useful thing to understand when your AC fails: a repair is money you spend alone, and a heat pump replacement is money that a rebate is designed to offset. It is also why a failed air conditioner is a genuinely different financial decision from a failed refrigerator or water heater.
There is no single age, but the decision gets clear at the edges. Under roughly eight years with a minor fault, repair is usually the rational choice. Past roughly twelve years, most systems are close enough to end of life that a large repair buys you a short extension on equipment that will need replacing again soon. In between, the useful test is proportional rather than absolute: if the repair quote approaches a third of what replacement would cost, and the system is over ten years old, replacement is generally the better use of the money — particularly once a rebate is applied to the replacement and nothing is applied to the repair.
Yes. A heat pump in cooling mode is an air conditioner — it is the same refrigeration cycle in the same direction, and it is sized to your cooling load the same way. The distinction worth knowing is about efficiency rather than capability. ENERGY STAR certifies heat pumps down two different paths, and the cold-climate path, which is what most Massachusetts contractors tell you to look for, does not include the peak-cooling efficiency threshold that the standard path requires. Of 7,384 certified mini-split outdoor units in the federal database, 965 do not meet that cooling-efficiency criterion, and every one of the 965 is a cold-climate certified unit. They cool. Some of them simply cost more to run on the hottest days than a unit certified the other way.
We service what we install, under warranty. We also register the manufacturer warranty for you after installation, which matters more than it sounds: warranty coverage generally depends on the equipment being registered within a limited window after install, and it is one of the most commonly missed steps in the industry. A customer who never registers can lose years of coverage they believe they have. On the systems we most commonly install, registered coverage runs twelve years on the compressor and parts. Terms differ by manufacturer, so we confirm the exact figure for the equipment on your quote.
No. Ductless systems are zoned, which means you can condition the rooms that actually need it and add zones later on the same outdoor unit if it was sized with that in mind. If one room is the real problem — a converted attic, a bonus room over a garage, a back office that never cools — that is often a single-zone job rather than a whole-building project. Tell us what the actual complaint is and we will scope to it rather than up from it.
For commercial projects, yes, and this catches people out. Since July 1, 2026, Mass Save® commercial heat pump projects require pre-approval before equipment is purchased, and the resulting Rebate Commitment Letter is valid for four months. Installing before that letter is issued can forfeit the rebate entirely. We handle the pre-approval paperwork as part of the job. If you already hold a commitment letter, check its date — the four-month clock runs from issue, and letting it lapse means reapplying under whatever terms are current at that point.
Then this may not be your page, and we would rather say so than sell you something. Our work is ductless — individually zoned indoor units connected to an outdoor unit, no ductwork required. That is the right answer for buildings with no ducts, with window units, with a failing condenser serving an already-ductless system, or with one or two rooms that were never comfortable. If you have a functioning duct system and a dead central condenser, a ducted replacement may serve you better, and that is worth an honest conversation rather than a quote.
Sources
- US EPA, ENERGY STAR Certified Mini-Split Heat Pumps (dataset
akti-mt5s). Retrieved 11 August 2026. All unit counts on this page are deduplicated by outdoor unit. - US EPA, ENERGY STAR Program Requirements for Central Air Conditioner and Heat Pump Equipment, Version 6.2 (Rev. March 2025), Tables 2 and 3.
- Mass Save® — Business Heat Pumps. Pre-approval requirement and Rebate Commitment Letter validity.
- National Energy Improvement Fund — Mass Save® Commercial Financing. Rates, terms and eligibility.
Disclosure. Advanced Ductless installs ductless heat pump systems in Greater Boston and earns revenue when a reader replaces rather than repairs. We do not service, diagnose or repair equipment installed by other companies, and we do not perform ducted or central air conditioning replacements. We have tried to write the page we would want to read if our own system had just failed, including the parts that point away from hiring us. Every figure above is traceable to a source in the list, and this page carries a re-verification date of 10 February 2027.
Not sure whether to fix it or replace it?
We will look at what you have, tell you honestly whether it is worth repairing, and if replacement is the better call, confirm in writing which incentives your building actually qualifies for. No cost, no obligation.