If my semi remains unused for a couple of weeks the boiler fills with water. In my opinion it can only be one of two things. A fractured HX or a failing fill solenoid in the base. Before I start pulling things apart I would like to hear other opinions. Tomorrow, I'll try and get the compressor onto the HX as a start..

Probably non related (I hope) the inside of the head where the green "O" ring is, the chrome is flaking. I'm about to get it re chromed. I was thinking maybe a flake or two of chrome may have worked it's way down into the solenoid but as far as I can see it could only go up into the 3 way.