What can replace R12 refrigerant?
3 Answers
R12 refrigerant can be replaced with R134 refrigerant. It is a colorless gas at room temperature, a convenient and safe refrigerant widely used in various refrigeration systems. Due to its ozone-depleting properties and greenhouse effect, R12 has been internationally and nationally banned as a refrigerant. R134a has good chemical stability. However, because its water solubility is higher than that of R12, it is not favorable for refrigeration systems. Even a small amount of moisture, in the presence of lubricating oil and other factors, can produce acids, carbon dioxide, or carbon monoxide, which can corrode metals. As a replacement for R12, many of its characteristics are very similar to R12. R134a has very low toxicity, is non-flammable in air, and has a safety classification of A1, making it a very safe refrigerant. R-12, Chinese name: dichlorodifluoromethane, Freon 12.
I remember driving many old cars before, and R12 refrigerant was commonly used but has long been banned due to its ozone-depleting properties. The best replacement now is R134a, which most older cars can switch to—it's affordable and easy to find. However, before switching, you need to inspect the system, as O-rings may have aged and leaked, requiring replacement with compatible green-ring components. The compressor oil should also be replaced to avoid clogging. I once tried adding R134a directly into an old system, but the cooling performance was poor—it only improved after replacing the desiccant. I recommend going to a professional repair shop, as they can vacuum the system and refill it with new refrigerant in one go. Avoid using other off-brand substitutes, as they may damage the pipes and compromise driving safety. Regular AC inspections can prevent issues, saving money and ensuring peace of mind.
I just solved the R12 issue with my old used car. After researching for a while, I found that R134a is the mainstream option. Changing refrigerant isn't a small job—it might require modifying the interface and replacing the oil, costing around 200-500 RMB. The new systems use R1234yf, which is more environmentally friendly but pricier, and may not be cost-effective for everyday cars. The key step is ensuring the system doesn't leak, otherwise, the fix won't last long. The mechanic I hired tested for leaks first before starting, making the whole process simple and efficient. The AC cooling performance improved noticeably, making driving much more comfortable. Remember to choose compatible refrigerant, avoid mixing old fluid, and maintain the system for long-term health.
