Question about 1993 Ford Taurus

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No air on 93 taurus using 134a, compressor does not engage

Did work 2 weeks ago but had leak then quit cooling - was originally r-12 but worked using 134a

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You are probably low on freon again. If the system is low, the pressure switch won't turn on the compressor. Add a can of R134A using a hose that has a gauge on it. It should read in the "Good" area if you have enough freon. Adding a can will probably be enough to start it working. If so, look for a leak somewhere, usually around connections where O rings leak.
You will see some oil spotting where the leak is.

Posted on May 10, 2009

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