I have read that you are supposed to get your a/c system vaccumed/purged to remove the r134a from the system before recharging with the R12a. R-12a is a hydrocarbon-based refrigerant. Answer: What damage can be done by adding R134a refrigerant to the a/c port on the compressor of a car? Just adding R12a to a 134a system doesn't work very well because a 50/50 mix is very inefficient. What Happens If You Put R134a in an R12 System? A leak is typically caused by a mixture of moisture and refrigerant that, when combined, creates a corrosive acid that eats away at seals, valves, and hoses in the A/C system. Some devices are designed for blended refrigerants and this is relatively common in this day and age, and the system is designed to cope. The R12 systems work differently than the R134a AC systems. Mount the conversion fittings on the new receiver dryer. On top of the retrofitting, the R12 system needs to be properly cleared If you don't have a vacuum pump, you can still make it work though. Its pretty straightforward mixing R134A and R12 is something that you should never do. What happens if you put R134a in a R12 system? In most cases, mixing different types of refrigerants is illegal. It is illegal to mix R12 and R-134a, and even if you bleed out the R12, the system needs to be adjusted to use R-134a. The advantage of ester oil is that it works with both R12 as well as R134a, so you can fill the system with it and then use either refrigerant. Bottom line, R134a simply doesnt cool as well as R12. R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. Symptoms include difficulty in breathing, vomiting, eyes burning, and skin irritation. R12 systems use mineral oil, and mineral oil is incompatible with R134a. Once it comes into contact with the mineral oil, it can trap the oil and reduce or cease any heat transfer. They dont run in the correct pressure range. Additionally, since R134a is composed of much smaller molecules, it has a greater chance of leaking from an R12 system. We have a list of preferred shops in your area that can help if you need it. Hello, chaos ensues if you mix those two refrigerants, "Polyol ester oils and R134a are miscible. The performance of the system is identical to with R22 refrigerant. You might face a ton of issues and also damage your system. Still, the answer is an emphatic, No.. Bottom line, R134a simply doesnt cool as well as R12. What happens if you put R12 in a R134a system? The system described here that is overcharged is a low-temperature commercial refrigeration system incorporating a TXV metering device with a receiver. If you put R134a gas in an R12 system, the first thing you will notice is the leaks that will develop and damage your system. warmer outlet air temperature. It blows 38 degree air with a room temp of 75 degrees with the fan on high speed. You may be aware that R134a was commercialized and sold as a replacement for use on R12 type systems. Mount the conversion fittings on the new receiver dryer. Remove the low-side fitting thats located on a pipe below the dryer and swap it with the conversion part. For that reason, R12 and other chlorofluorocarbon (CFC) substances were declared as hazardous in an international treaty called the Montreal Protocol and were phased out of production and use. R134A should never be added into an R12 system, or you risk spontaneous combustion. R-22 is a high pressure refrigerant and R-134a low pressure refrigerant. The following system checklist shows a system with an overcharge of refrigerant (values in degrees F except where otherwise indicated). Even if Remove the old receiver dryer and O-rings. This could be a total nightmare to fix. R12 was determined to contribute to depletion of ozone in the earths upper atmosphere. A leak in your A/C system could be causing the unit to blow warm air, since there. What Happens If You Put R134a in an R12 System? R32. In most cars that are on the road today, R134a refrigerant makes the A/C system blow cold on hot days. There are many answers to the question of whether or not you can put R134a refrigerant into an R12 system, and thats for good reason. The oils are different and not compatible and can cause an explosion. Compressor overheating and tripping on the overload. Bottom line, R134a simply doesnt cool as well as R12. I turned it on, connected the gauges and started adding R134a refrigerant. Anyone with the required EPA R-12 certification still can buy the 1-pound cans at auto-parts stores, but the cans are kept in the back and guarded like gold. This indicates that an R12 charge level of 2 lbs. converts to an R134a charge level of 1.55 lbs. While the formula above is helpful, you might be strapped for time and need an answer quickly. Below is a PDF of tables that show R12 to R134a refrigerant charge conversions in pounds and ounces: R134a is so much smaller than r12 that it will leak right through the older hoses used for r12. This is due to the requirement of R-134a to have a lower setting of 3.3 psig to achieve freeze protection at 32 F. This may result in a 4-degree F. If not corrected the pump will fail. Remove the low-side fitting thats located on a pipe below the dryer and swap it with the conversion part. (2.2C.) This also means that some refrigerant conversion needs to be done in order to drop R134a into a R12 system. When technicians and facility managers search the web to learn about the refrigerant in the unit they're working on, there are four types that often get linked to one another. This cost differential has motivated many end-users to question whether they could simply use R-134a in an R-1234yf system. A small refrigerant leak is the most common reason a car's A/C gradually loses its cool. Some types of POE's are fully miscible with R134a (as are synthetic alkylate and R22), while some POE's are partially miscible with R134a (as are mineral oils and R22) If there was little R12 left in the system you would get a milky looking refrigerant flow in the sight glass and as you know poor oil return. By charging a R-134a system with R-22 the compressor displacement changes causing hi compression ratios, high discharge line temperatures. R-12 is a chlorofluorocarbon that was used in automotive applications up until 1994, when it was phased out because of its tendency to destroy ozone when released into the atmosphere. R134 was specifically designed to replace R12 used in smaller air conditioning units, such as those used in vehicles. The mixing of R-134a with R-1234yf will change refrigerant pressure and may result in evaporator freeze-up on pressure control systems, reducing system airflow. What happens if you put R12 in a R134a system? You could create an explosion since the molecular structure is completely different. What happens if you mix R134a and R12? The miscibility of polyol ester (POE) oils and R134a is similar to that of current refrigerant oils and R22. R-134a, a hydrofluorocarbon, was the refrigerant of choice between roughly 1994 R134 is a member of the more recent generation of hydrofluorocarbon (HFC) refrigerants that has replaced older, ozone-depleting chemicals, such as R22 and R12. The molecule size of R134a is smaller than that of R12, so there was concern that R134a could leak out through the hoses and flare fittings that R12 systems used. R134a is also a smaller molecule than r12 so if you HAD a small leak with r12 that you did not fix you have an even bigger leak now. The A/C system in many older vehicles needs to be converted from R12 refrigerant to R134a refrigerant. There are three different refrigerants officially sanctioned by the EPA for automotive usage: r-12, r-134a, and r-1234yf. Steps To Retrofit The R12 To A R134A System: Locate the receiver dryer and check if all of the R12 has been bled out. It took about 12 ounces of the original 13.6 ounces until it was cooling well and was not developing frost on the evaporator. R134a systems work at higher discharge-side pressures than R12 systems, which could lead to compressor seals leaks . Does it matter what kind of freon you put in your car? Re: What would happen if you added R134A to R12? R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. R-12 and R-134A are medium temperaturerigerants, whereas comfort cooling is high temperaturerigerants. Will AutoZone recharge my AC? What happens if you put r134a in a r12 system? What happens if you put R134a in a R12 system? That's required by law. So, along with R134a came a new oil: Polyalkylene Glycolor PAG oil. R134a is a low pressure and temperature refrigerant. Additionally, since R134a is composed of much smaller molecules, it has a greater chance of leaking from an R12 system. After all, the systems are very similar, the refrigerant properties are comparable, and there are adapters sold online which would help facilititate such a retrofit. Steps To Retrofit The R12 To A R134A System: Locate the receiver dryer and check if all of the R12 has been bled out. What Can Happen if you Use R134a in an R12 System? There are many answers to the question of whether or not you can put R134a refrigerant into an R12 system, and thats for good reason. Unfortunately, you absolutely cannot mix R134A in an R12 system. What happens if you put R134A in a R12 system? R134A should never be added into an R12 system, or you risk spontaneous combustion. You could create an explosion since the molecular structure is completely different. Can you put R134a in a R12 system? I have seen systems where this has happened and you would not be able to tell from the way it operated that it had a mixture of refrigerants. R12 systems used mineral oil, but unfortunately mineral oil doesnt dissolve in R134a. Remove the old receiver dryer and O-rings. There are several things that can go wrong: If you hook up to the wrong port the compressor can push refrigerant into the R134a canister under high enough pressure to cause it to burst. The refrigerant is R-134a. What happens if you put R12 in a R134a system? Your AC compressor can develop leaks and can be damaged. R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. Mechanically, adding R-12a to an R-134a system won't harm anything. R134a systems operate at higher discharge-side pressures than R12, which can cause compressor seals to leak. To be able to use R134a in an R12 system, the R12 system needs to undergo a retrofitting so that its able to handle and process R134a refrigerant. Not only does it damage your vehicle severely, but it is also illegal according to federal law. R134a systems work at higher discharge-side pressures than R12 systems, which could lead to compressor seals leaks. R134a reacts with water to form hydrofluoric acid which damages the internal A/C components. This is why it is crucially important that R134a systems be properly evacuated (pumped down to boil off any moisture) and kept sealed. In the years following the switch to R134a, there was confusion over what was required to maintain the A/C of older cars. They had to develop BARRIER hoses to contain r134a. All refrigerants have a distinctive R-number that identifies them. R290. Next you attach your hose to the low pressure fitting and let out all the pressure. In the chart below, we compare R32 vs R290 vs R134a vs R12 refrigerant, so you have all the basic details when conducting your research. First warm up the car with the air on and then turn it off.

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