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This one was a DIY customer who like to use small cans and a hose to recharge his A/C. It worked for a little over 2 years. The oil should be clear. After replacing the expansion valve that was stuck closed and the direr, poured out the old oil from the compressor and replaced it with new, puller a vacuum to below 500 microns for 1 hour, recharged. " WOW it's never been this cold before! ". Wonder why ?