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(CFC)-12 MVACs are retrofitted to operate using hydrofluorocarbon hydrofluorocarbonA compound consisting of hydrogen, fluorine, and carbon. CFCs are numbered according to a standard scheme (). A table of all ozone-depleting substances () shows their ODPs, global warming potentials (GWPs), and CAS numbers. The ozone depletion potential (ODP) for each CFC is, respectively, 1, 1, 0.8, 1, and 0.6. CFCs are commonly used as refrigerants, solvents, and foam blowing agents. They move to the stratosphere and are broken down by strong ultraviolet (UV) light, where they release chlorine atoms that then deplete the ozone layer. In most cases, chlorofluorocarbon chlorofluorocarbonA compound consisting of chlorine, fluorine, and carbon. Retrofitting an MVAC involves converting the system to use an alternative refrigerant. Retrofitting MVACs for an Alternative Refrigerant In some cases, the technician will need to add refrigerant to the system to detect a leak. A few ounces (about 10 percent of the normal charge) are sufficient to perform the leak check.

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MVACs do not need to contain a full charge of refrigerant to locate a leak. However, technicians may have difficulty locating small leaks, even if using sophisticated leak detection equipment. Technicians can identify refrigerant leaks most of the time, especially if they are using an electronic leak detector certified under the Society of Automotive Engineers J1627 standard. Technicians occasionally tell customers that any refrigerant that was in the vehicle cannot be returned due to federal regulations. Other shops keep recovered refrigerants to make up for the cost of the recycling equipment. Shops might also charge a refrigerant recycling fee to offset the cost of purchasing or maintaining the specialized equipment that they are required to use to recover and recycle refrigerant. Topping off is less expensive than evacuation and recharge services.Īs an alternative to the flat fee, shops might charge separate fees for labor and for the amount of refrigerant charged into the system (e.g., based on recommendations from the MVAC manufacturer). The cost of both services usually includes a system performance check and may include a leak detection test. Common Servicing Feesīecause technicians cannot determine how much refrigerant is in your MVAC, many charge a flat fee for top-off or evacuation and recharge services. When technicians repair or replace system components, they should recycle the refrigerant. Opening a system means any service, maintenance, or repair that could release ozone-depleting refrigerant. However, there is no reason to clean the refrigerant unless technicians open the system. Some technicians believe that evacuation and recharge is better for MVACs because the refrigerant is cleaned before being recharged. Evacuation and recharge service allows technicians to add the precise amount of refrigerant recommended by the MVAC manufacturer. They may undercharge or overcharge the system-both of which impair system performance.Įvacuation and recharge service involves removing the MVAC refrigerant, cleaning it using recycling equipment (to remove impurities), recharging it into the system, and adding new refrigerant to replace the amounts that have leaked out. There is no way for technicians to determine how much refrigerant is in your MVAC system when you arrive at the shop, so they must guess how much refrigerant to charge into the system. Topping off Versus Evacuation and RechargeĪ top off involves adding refrigerant to your MVAC. If done properly, repairing or replacing leaking MVAC components will provide longer lasting benefits. Topping off or recharging a system should improve cooling the passenger compartment, but neither service permanently fixes refrigerant leaks.

Repairing or replacing leaky MVAC components and recharging the system.Evacuating remaining refrigerant and recharging the system.Topping off the system with refrigerant.Vehicle owners generally have three options for addressing leaks and recharging refrigerant in their MVACs. Stopping refrigerant leaks from MVACs helps protect the environment and improves your system’s cooling performance. Motor vehicle air conditioners (MVACs) use refrigerants that can contribute to ozone layer depletion, climate change, or both.

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