I was working on a Subaru Legacy GT Wagon today. Apparently, the air con system behaved in a peculiar way.The air was cold for a brief moment and then hot air instead. After hot air, cold air next. It went on and on.
After flushing, then we found the cause to the strange encounter. The system had too much oil in the system, twice as per normal! Furthermore, the condition of the compressor oil was also BAD.
What happen when there is too much oil in the air con system? The expansion valve will get choked and air con performance could become intermittent, just as mentioned earlier.
As per owner, the system was never serviced before. Car came out straight from factory and never once was the air con system touched. His feedback about his air con system was just as mentioned too. He thought that it could be normal somehow BUT IT IS SURELY NOT!
Too much oil in a system will make the compressor 'choked' and same applies to the rest of the parts in the system.
If you do encounter such similar situation, go to your trusted workshop for rectification before it is too late. Otherwise, you know who you could reach too.
;)
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