What Manufacturers think about the use of a/c “Stop Leak” ?
Refrigerant must be 99% or more, pure, anything less than this value is considered a contaminated refrigerant and therefore contaminated air conditioning system.Any warranty on the car’s ac system will be automatically void if any type of sealer is found in the system.
A/C stop leak.
Vehicle and A/C part manufacturers do not endorse the use of sealants. Sealant is made to plug small holes by hardening when it contacts the moisture in the air. The problem is that a leaking system has absorbed a lot of moisture and spread into every component of the air conditioning. The sealant reacts with moisture inside a condenser or other component, creating a restriction in the normal flow of refrigerant. They will weaken rubber parts, have no effect at all, or create larger particles that will clog the filters, orifices tubes, screen protections and other parts of the AC System.
Flushing the sealant out from the ac system.
Once installed it is difficult, if not impossible to remove all the sealant from the system. There is a big risk of contaminating and damaging a new ac compressor even after the entire system has been flushed. Some air conditioning components like parallel flow condensers or evaporators are virtually impossible to effectively flush.An small and inexpensive service valve core leak could become a time consuming repair job because of the use of “a/c stop leak” products.
Contaminated refrigerant symptoms.
Some of the symptoms of a contaminated air conditioning system are: reduced cooling performance, evaporator ,thermal expansion valve or orifice tube freeze-up, intermittent cooling, increased compressor noise, higher than normal or lower than normal pressures, and premature compressor failure.
Motor Vehicle AC repairs.
Many shops will refuse to even connect their recovery machine to your car’s ac system if they suspect the use of sealant. Sealants could do really expensive damage to recovery equipment creating a huge problem for repair shops.