How much does it cost to recharge an AC with refrigerant?
Per HomeGuide's national figures, an R-410A recharge typically runs $100–$320 at $50–$80 per pound, and R-22 costs $90–$150 per pound. A low system has a leak, though, and finding and fixing it plus the recharge runs $200–$1,500 nationally. Fixing the leak first usually beats paying for a top-off every summer.
Key points
- An AC doesn't use up refrigerant; if it's low, it's leaking.
- HomeGuide's national figures: R-410A $50–$80 per pound installed, R-22 $90–$150 per pound.
- Finding and fixing a leak and recharging runs $200–$1,500 nationally, per HomeGuide.
- R-410A is not banned: existing systems can still be repaired and recharged.
- A leaking indoor coil on an older system, or any R-22 system, is where replacement gets priced alongside the repair.
Per HomeGuide's 2026 national cost guides, an R-410A recharge typically runs $100–$320, at $50–$80 per pound installed, and R-22 costs $90–$150 per pound, or $180–$600 for a typical recharge, because it's no longer made. Those are national figures, not our prices. The bigger number is usually the leak: an air conditioner that's low is leaking, and HomeGuide puts finding and fixing the leak, plus the recharge, at $200–$1,500.
An air conditioner doesn't burn refrigerant the way a car burns gas. The same charge circulates in a sealed loop for the life of the system. So if a tech tells you the AC is low, the next sentence should be about where it's leaking. HomeGuide, whose national cost guides we use for outside figures, says the same thing: a system only needs refrigerant if it has a leak.
What goes into the cost of an AC refrigerant repair?
A refrigerant repair has three parts: finding the problem, fixing the leak, and putting the right charge back in. HomeGuide's 2026 guides give these typical national ranges. They are not our prices.
| Item | Typical national range (HomeGuide) |
|---|---|
| R-410A refrigerant, per pound installed | $50–$80 |
| R-410A recharge, typical total | $100–$320 |
| R-22 refrigerant, per pound installed | $90–$150 |
| R-22 recharge, typical total | $180–$600 |
| Leak detection test alone | $100–$330 |
| Find and fix the leak, plus recharge | $200–$1,500 |
| Evaporator coil, out of warranty | $2,500–$4,500 |
| Evaporator coil, under warranty | $1,000–$2,500 |
HomeGuide also notes that some shops add a $30–$100 recovery fee on R-22 work. The number of pounds depends on how much leaked out and how long the line set is. A system that's a pound or two short and a system that's empty are very different bills.
On our side, a service call carries a $79 trip charge, waived when you approve the repair, and you get a written, flat-rate price before any work. See our AC repair page for what that visit covers. The same pricing applies to AC repair in Minneapolis, AC repair in Saint Paul and every other town we serve.
R-410A, R-22 and the new refrigerants
Plenty of what's written about refrigerant is out of date. The rules as of 2026:
- R-22 production and import ended January 1, 2020. Existing R-22 systems can only be recharged with reclaimed or stockpiled refrigerant, which is why it costs more per pound.
- R-410A is still legal to service. Existing systems can be repaired and recharged. Under the EPA's rules, new residential systems made from 2025 on use lower-GWP refrigerants, and in May 2026 the EPA removed the January 1, 2026 installation deadline for R-410A equipment built before 2025. The EPA posts these rules on its Technology Transitions page.
- R-454B and R-32 are what newer systems run on. They are not drop-ins for an older system, and an older system can't be converted by changing the refrigerant.
If your outdoor unit's label says R-22, read R-22 phase-out options before you pay for a recharge.
What problems look like low refrigerant but aren't?
Before anyone adds refrigerant, rule out the problems that mimic a low charge. Several of them cost far less to fix.
| What you notice | Can low refrigerant cause it? | Other common causes | Who checks it |
|---|---|---|---|
| Air is cool but not cold | Yes | Dirty filter, dirty outdoor coil, weak blower | You: filter and coil. Tech: the rest |
| Ice on the copper line or indoor coil | Yes | Clogged filter, dirty indoor coil, slow blower | Turn cooling off to thaw, then a tech |
| Runs all afternoon, never reaches the setpoint | Yes | Dirty coils, leaky ducts, a very hot, humid day | Tech |
| A hissing sound near the lines or coil | Sometimes, from a leak | A soft hiss at the indoor coil can be normal refrigerant flow, and a short one right after shutdown is pressures equalizing | Tech |
| Outdoor unit hums, fan doesn't spin | No | Failed capacitor or fan motor | Tech |
A clogged outdoor coil is the cheapest look-alike to fix, and our post on cleaning the outdoor AC coil shows how to rinse it safely.
How does a technician find a refrigerant leak?
The order a tech usually works in:
- Rule out the look-alikes. A clogged filter, a dirty indoor coil or a weak blower can freeze a coil and make pressures look low. Airflow gets checked first.
- Read the system. Gauges plus line temperatures give superheat and subcooling, which show whether the charge is actually low or something else is wrong.
- Check the easy spots. Service valve caps and cores, flare fittings, and places where the copper line set rubs a bracket or the cabinet.
- Sniff and bubble. An electronic leak detector narrows it down, and bubble solution confirms it at a fitting.
- Pressure test. When the leak won't show itself, the refrigerant is recovered and the system is pressurized with nitrogen to see whether it holds.
Indoor coils are a common leak point, and they're hard to reach inside the furnace plenum. Our post on a leaking evaporator coil covers those signs.
The Minnesota timing problem
A lot of these calls come on the first hot, humid week of June. The system cooled "okay" last August, sat all winter, and now can't keep up. The humidity is part of it: in a muggy Minnesota July the coil has to pull a lot of water out of the air, and a system that's short on charge falls behind fast.
A recharge in April has its own catch. Checking a charge by pressures and temperatures isn't reliable on a cool spring day, so a tech may weigh in the charge to the manufacturer's spec or schedule a check once it warms up. If the house is warm and the vents blow cool but not cold, run through AC not cooling first, then call.
Heat pumps and ductless mini-splits add a winter version of the same problem. They run on refrigerant all year, so a slow leak can show up in January as a heat pump that struggles on cold mornings and leans on its backup heat more than it used to. If your electric bill or furnace run time jumps without a change in weather, a charge check belongs on the list.
Should you fix the leak, top it off, or replace the AC?
Our usual calls:
- Small leak at a valve core, fitting or rub point: fix it, pull a vacuum where needed, recharge. Almost always worth it.
- Leaking coil on a newer system under parts warranty: replace the coil. The part may be covered, and HomeGuide's under-warranty coil range reflects that.
- Leaking coil on an older R-410A system: price the coil and a new system side by side. Once a coil job climbs toward the cost of new equipment, the new equipment usually wins.
- Any R-22 system with a real leak: replacement is usually the better use of the money.
- Topping off every summer without a repair: the most expensive option over three or four years, and hard on the compressor.
For the replacement side of that comparison, a new central air conditioner installed with us runs $5,200–$9,800. Our AC replacement cost guide explains where a house lands in that range, and our AC installation page covers what a new system includes.
What to do next
If the AC runs but won't cool and you see ice on the lines, switch the thermostat from cooling to off so the coil can thaw, and leave it off until someone looks at it. Running a starved system keeps the compressor working hot. If the outdoor unit's breaker trips, reset it once at most. If it trips again, leave it off. Then call 612-429-3465. We're open 7 days, 7am–9pm, and the $79 trip charge is waived when you go ahead with the repair.
Questions
Can I recharge my AC myself?
No. Handling refrigerant on a central air conditioner takes EPA Section 608 certification, and a charge can only be set correctly with gauges, temperature readings and the manufacturer's charging method. Adding refrigerant without finding the leak also just buys a few weeks or months before the system is low again, and the compressor runs short the whole time.
Is R-410A being banned?
No. New residential systems made from 2025 on use lower-GWP refrigerants such as R-454B or R-32, but existing R-410A systems can still be repaired and recharged. In May 2026 the EPA also removed the January 1, 2026 installation deadline, so R-410A equipment built before 2025 can still be installed.
Can you put the new refrigerant in my old AC?
No. Each system is designed and rated for one refrigerant. An R-410A system gets R-410A, and newer R-454B or R-32 systems get their own. Those newer refrigerants are classed as mildly flammable (A2L), and equipment built for them carries safety features older units lack, so they are not drop-in replacements. Mixing refrigerants or swapping one for another isn't a repair.
How do I know if my AC is low on refrigerant?
Common signs are air from the vents that's cool but not cold, a system that runs all afternoon without reaching the setpoint, ice on the copper line at the outdoor unit or on the indoor coil, and sometimes a hissing sound. A frozen coil can also come from a dirty filter or a weak blower, which is why a tech checks airflow before blaming the charge.
Sources
- Technology Transitions page epa.gov
- HomeGuide cost guides (2026 editions) homeguide.com