Hello. I am confused Toyota and other car manufacturers don't approve flushing, if the system fail they recommend replace the contaminated parts. I have change two Compressors in less then a year on a 2006 Toyota Hiace.
There are many reasons (IMHO) the manufacturers do not approve flushing.
(1) Their primary focus on service and published service procedures is for the warranty period. (2) Their systems are often better and last longer than in years before. (3) It is cheaper and easier for them to replace than flush, given the number of expected failures they will see. (4) flushing done wrong is disastrous and they know it. (5) Flushing done right requires technician involvement and they prefer written procedures to reduce technician involvement (thinking). (6) And many more.
However, in the aftermarket; the compressor manufacturers do require flushing; but will not warranty a compressor if it is not done properly. If you are not flushing or replacing the contaminated components (the entire system gets contaminated) with your compressor changes; this could very well be the root cause of repeat failure. If you do not flush properly this will also cause repeat failures.
For more on this topic, read the Tech info in my signature.
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