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The fan is running and it is blowing air through the vents but its hot air. This happened overnight so I'm thinking it's not needing freon ???

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The question would be, is your outside condensing unit working, fan and compressor? If not, you might have a capacitor out or a burnt motor/compressor. If everything on the outside unit is working properly, then you might have a refrigerant problem, and it can seem like it happens over-night sometimes. The charge just slowly decreases and eventually it will not condense or evaporate the way it needs to. Just some things to consider, hope it helps!

Posted on Aug 01, 2010

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