Definitely Vapor if by high pressure port. By low pressure port,

I believe it must be vapor too, but once it enters and since the compressor is up compressing, the vapor soon converts into liquid.

A trick for charging freon is usually to put the bottle in a bucket with warm water. This will help the liquid freon in the bottle turning into vapor faster. The bottle will soon become so freezing if not doing so.

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• Thanks x88. -Gulang- ♂ (0 bytes) () 03/04/2013 postreply 18:47:10