What can replace R12 refrigerant?
2 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.
