I had the same problem.I opened it up and it was a cracked cylinder head on top of the 3 pistons behind the outlet connector.It is molded plastic and could not get a replacement.I was considering epoxy glue but doubt it will hold the pressure.
Theo Antreou
September 2011
Did you get an answer to this as I have exactly the same problem.
simon
May 2011
Automatic Answer
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