The stop leak sealer in DIY recharge kits rarely works So you wind up with the proper amount of oil and a dry system that works like it came from the factory something a DIY recharge kit can never accomplish. Next, they add the factory recommended oil and refill the refrigerant using a special refrigerant scale. Then they evacuate the system to remove all remaining moisture. In other cases they must replace the compromised components.
In some cases they can remove the sludge by flushing the component. Once the leak isrepaired, the shop will examine the system to see if there’s sludge buildup caused by acid and lubrication breakdown.
The only way fix an AC leak is to locate it and fix it with new O-rings, hose or metal components. In other words, it’s never work properly. If there’s 20% air in the system, you will never get the same amount of cooling as a comparable system with no air. So even though it takes up the space, it doesn’t provide any cooling. That causes the system to run cold, then warm, then cold again.Īir in the system may compress like the vaporized refrigerant, but it doesn’t boil and vaporize like refrigerant. Finally, when liquid refrigerant is metered by the expansion valve or orifice tube, moisture can cause an ice formation that slows or blocks the refrigerant flow. The acids also eats away at critical internal seals, causing early failure. The sludge coats the internal passages of the condenser and evaporator coils, reducing their ability to transfer heat. It reacts with the refrigerant and oil to form destructive acids and sludge. 2) Whenever an AC system leaks, air and moisture enters the system and that’s a much bigger problem. Then you’re operating the system when it’s low on oil and that causes premature compressor wear. When refrigerant leaks out, some amount of oil goes with it. No big deal, you say? Well, there’s two key issues to consider when it comes to refrigerant leaks 1) the refrigerant carries oil throughout the system and that oil lubricates the compressor pistons. If the system is low on refrigerant, it’s because some of it leaked out. If your AC system is low, you’ve got a leak and the AC recharge kit probably won’t fix it.Īll engines burn some amount of oil, but AC systems don’t use up refrigerant. But beware, the AC recharge you performed today may actually be setting you up for a much more expensive repair down the road. From the consumer’s point of view, this is all you need to get your car’s AC up and running again. The can is filled with the R-134a refrigerant, oil and stop leak sealer. Most DIY AC recharge kits come with a container of R-134a refrigerant, a low pressure gauge and a low pressure quick connector. Repair Topics > Air Conditioning Symptoms and Repair > Reasons to avoid AC recharge kits Reasons to avoid AC recharge kits Don’t use a DIY AC recharge kit to fix your car’s AC
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