Can a homeowner buy refrigerant to recharge their own AC?

No. A homeowner cannot legally buy refrigerant for a home central air conditioner or heat pump, or recharge one. The EPA's answer to this exact question is short: "Section 608 Certification is required to recharge appliances. Refrigerant for stationary appliances is only sold to certified technicians or the companies that employ them."^[1] And a system that needs refrigerant has a leak, which is a repair for a certified, licensed HVAC technician.

Who may buy refrigerant

The rule is the EPA's refrigerant sales restriction under Section 608 of the Clean Air Act. Only EPA-certified technicians may buy refrigerant, with limited exceptions, and only Section 608-certified technicians may buy refrigerant meant for stationary air-conditioning and refrigeration equipment.^[2] An employer can also buy it by giving the wholesaler written evidence that it employs at least one certified technician.^[2]

The restriction covers refrigerant in cylinders, cans and drums.^[2] Being certified for cars is not enough. Technicians certified under Section 609, the motor vehicle program, cannot buy refrigerant intended for stationary equipment, whatever the container size.^[2]

Sellers are on the hook too. Wholesalers must keep invoices showing the buyer's name, the date of sale and the quantity sold, and wholesalers that sell refrigerant for resale are legally responsible for making sure their customers are allowed buyers.^[2]

What about the cans at the auto parts store

Those are for cars. Small cans of car air-conditioning refrigerant, holding two pounds or less, with unique fittings and self-sealing valves, can still be sold without certification for do-it-yourself use on vehicles.^[2] The exception exists for small cans of car refrigerant such as R-134a;^[2] charging a home system is certified work whatever the container.

Why the work itself needs certification

The rules cover more than buying. Activities that need Section 608 certification include attaching or detaching hoses and gauges, adding or removing refrigerant, adding or removing components, and cutting the refrigerant line.^[1] Even attaching gauges to check the charge falls inside that list.

Letting refrigerant escape is a separate violation. EPA regulations under Section 608 of the Clean Air Act prohibit intentionally venting refrigerant while maintaining, servicing, repairing or disposing of air-conditioning equipment.^[4]

Buying it anyway does not help

Some online sellers will ship refrigerant to a buyer who ticks a box saying it will be passed to a certified technician, but HVAC companies generally will not use a customer's own supply.^[7]

More to the point, refrigerant was never the real problem. A system should not be low on refrigerant unless it has a leak or was charged incorrectly at installation,^[6] so adding more only refills a leak. The EPA asks homeowners to have technicians locate and repair leaks instead of "topping off" leaking systems.^[1] Over-the-counter sealants sold as "stop leak" are not a substitute for finding and repairing the leak.^[8]

Watch out for R-22a

Owners of older R-22 systems are the usual target for cheap substitutes. R-22a is a hydrocarbon blend whose main components include flammable substances such as propane and butane, and it has been falsely marketed as R-22 or an R-22 replacement.^[1][5] Because a home R-22 system has no safety features for a flammable refrigerant, R-22a can burn or explode if enough of it collects in one space and meets an ignition source.^[1][5]

It has been sold under names including Blue Sky 22a, DURACOOL-22a, EC-22, ES-22a, Frost 22a and RED TEK 22a.^[5] If you think R-22a or another hydrocarbon refrigerant was put into your air conditioner, the EPA recommends contacting your local fire department for guidance.^[5] Tell any technician before they open the system.

What you can check before calling

Weak cooling has causes that have nothing to do with refrigerant. What to check before calling for AC repair lists them. If the signs still point to refrigerant, how to tell if your AC is low on refrigerant covers what they look like.

When to call a licensed pro

Call when cooling has dropped off and the filter and thermostat are not the cause, or right away if you see ice on the lines or hear hissing. Ask whether the company's technicians are Section 608-certified; you can ask a technician to show you the certification card.^[1] EPA does not issue the cards itself; they come from the certification programs.^[3]

In Virginia, no individual may work, or offer to work, as a tradesman in heating, ventilation and air conditioning for the public for pay without a licence, unless working under the supervision of a tradesman licensed in that specialty.^[9][10] Check the business on DPOR's License Lookup^[11]. For what the technician will do and what it costs, see how a refrigerant leak is found and fixed and what fixing a refrigerant leak costs in Virginia.

Getting it fixed

Loclis lists DPOR-licensed HVAC businesses with their licence number and class. Find HVAC businesses in Blacksburg, see refrigerant leak repairs, or browse more HVAC repair answers.

If your AC needs refrigerant, it needs a leak repair: describe what it is doing once and licensed local HVAC businesses quote the work.