Neil,
Mine always shows half full. It use to show empty but not today. Last year I took the wand apart etc. and repaired it as the list suggested but worked only for a few weeks.
Filled it so green light would show once and my Westy floor got wet so I haven't filled it all the way up. Even replaced and tightened all the hoses. Let me know what you find out.
Also was suggested that the ground is likely a problem. Trying to understand the wiring from my Bentley I can't find the ground for this circuit on my 88 GL Westy.

Dennis Jowell
Scotch Hollow Farm
Newbury, Vermont 

> On May 22, 2016, at 1:58 PM, Neil2 <vidublu@GMAIL.COM> wrote:
> 
> Would someone tell me how the thing senses the water level?
> 
> Mine shows Full all the time on the LED panel.
> 
> --
> Neil2
> '82 Diesel Westfalia (Ducky)
> '86 Vanagon/Westfalia Wannabe (SaVannah)
> '08 170" 2500 Mega Roof Dodge Sprinter (Moby)
> '90 Westfalia Subagon
> Fulltiming since August 2008
> Nunquam Pendite Divendium