Even if you’re OK with that, if the system needs work, any refrigerant in it will need to be recovered. Certainly no one selling cans of R12 on Craigslist is asking for your EPA 609 card. If you use anything other than R134a, you’ll likely create a situation where you must be the one servicing the system. That’s not true either. So, along with R134a came a new oil: Polyalkylene Glycol—or PAG oil.Note that there is another kind of oil called Polyol Ester Oil (POE). We’re most familiar with water, which we see as ice when it’s cold, liquid when it’s at room temperature, and steam when we boil it.

Before 1995 most vehicles came with R12 refrigerant in the air-conditioning system. (To be clear, both cars also have a new rotary-style compressor and a big parallel-flow condenser and fan. R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. Firestone car A/C recharging and air conditioner services will keep you cool on hot days. These are cars with poor A/C reputations, which is precisely why I continue to use R12 in them.

If the target environment is only moderately hot, and your use of the car is light, R134a will probably be fine. Air Conditioner Freon - A/C Freon for cars and trucks. Upload from your computer. He is in the heating and air conditioning business and is cleaning out some unnecessary old supplies. For more information on what cookies we use and how to manage these cookies please visit our Because A/C compressors have moving parts, they require oil. We learned the theory behind refrigeration and air conditioning, which centers on this wonderfully useful bit of physics: When liquid boils and evaporates into a gas, it expands and cools. Search for Google images. We'll take it from there. CCI2F2 is its formula, which contains the chemicals that make it up. It’s often said that R12 is no longer available. ... Commercial use license images. Select a recommended image. If you experience car A/C problems, Firestone offers quality car A/C repair services from experienced, ASE-certified automotive professionals. I have been reading some conflicting information concerning the use of R12 in residential HVAC systems. A/C recharge, retrofit, replacement & A/C repair services. … R134a reacts with water to form hydrofluoric acid which damages the internal A/C components. Someone I know has a leftover canister of R12 (Freon) refrigerant. Anyone selling R12 is required to verify that the buyer has an EPA Section 609 certification to work with mobile vehicle air conditioning (MVAC) systems. The problem is that some inexpensive available refrigerants—ammonia and propane, for example—Unfortunately, the widespread use of R12 appeared to be significantly degrading the Earth’s ozone layer, potentially causing a worldwide health crisis. Because R134a is an HFC, not a CFC (stay with me for a minute), it does not have the ozone-destroying properties of R12. And it was safe—neither poisonous to breathe, nor flammable. The Environmental Protection Agency outlawed ozone depleting substances in 1994 and, as a result, R-134a Freon is now used instead. With R12 you use to check to see if the site glass was “full”, if it had bubbles it meant you had a low charge. Very few DIY-ers have recovery equipment (I don’t), so you need to take the car to a shop that does, and fewer and fewer shops keep and maintain R12-recovery equipment. You I continue to use R12 in two of my cars—my 1972 BMW 2002tii and 1973 Bavaria. Of course, there could be other problems such as a seized compressor or a blocked expansion valve. When R12’s effects on the ozone layer became known and it was superseded by R134a, EPA came down hard with large fines “EPA performs random inspections, responds to tips, and pursues potential cases against violators of the Section 608 regulations. The Environmental Protection Agency outlawed ozone depleting substances in 1994 and, as a result, R-134a Freon is now used instead. Originally, R-12 Freon was used in car air conditioners. If your air conditioning is no longer cooling as well as it once did, then chances are you need to recharge the refrigerant in the system. With a tight modernized system that’ll accept either refrigerant, you should then consider where and how the system will be operated. Freon is a refrigerant that cycles through liquid and gas phases, and works to regulate the temperature of your car. A/C professionals derisively called these “death kits” because they had a reputation for causing the compressor to seize a few months later.Over time, a credible middle ground emerged. If an A/C system isn’t working, the root cause needs to be diagnosed, and the system needs to be fixed. The technical or chemical name of R12 is dichlorodifluoromethane. © 1996—2020 The Hagerty Group, LLC. Small NOS cans of R12 are widely available on eBay and Craigslist for about $30 apiece. If you’re going to go to all that effort on a vintage car with an A/C system that hasn’t been used in years, it usually behooves you do a full-on rejuvenation of the system and replace the compressor with a new compact rotary-style unit, replace the condenser with the largest parallel-flow condenser and big fan that’ll fit in the nose of the car, make all new hoses, and flush the evaporator. Originally, R-12 Freon was used in car air conditioners. I think that, with hindsight, many people would agree that, even given that R12 is an ozone-destroying agent, fines of this level made many hard-working A/C technicians hostile to the government, and thus were counterproductive.R12 and R134a are not the only game in town. An R134a-specific expansion valve was preferred but not strictly necessary. Since these days a can of R134a is about $15, the cost differential isn’t what it was in the panicked days of the mid-1990s.It’s often said that buying or selling R12 is illegal. His last canister, he estimates, has 25 pounds of R12 left of the original 30 pounds. On a long-dormant system, the odds are very high that it’s dead because it has no refrigerant in it, which means it has leaked out… which means there’s a leak that must be located and fixed. Used as a retrofit for R-12 in stationary positive displacement air-conditioning (AC) and refrigeration systems, Freon™ 409A works in: Walk-in coolers; Beverage dispensers You can then add ester oil that’ll work with either R12 or R134a. Of course, the receiver/drier needs to be replaced, as it does any time an A/C system is opened.

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