I filled both tanks on my new trailer. When one tank ran out it automatically switched over to the other tank. No problem so far.
I filled the empty tank and put it back on the trailer. I opened the valve.
When the tank that I was using ran out it did not switch over to the new full tank this time.
I switched the black lever over to read the pressure in the full tank and it showed red as if the tank that I had filled was empty.
So I took the new tank that I had filled and switched sides and it now showed green and worked fine.
So I am wondering why there was not an auto switch over this time and why did the full tank read red until I connected it to the other side.
Did I do something wrong or is the auto switch over not working.
i've had to replace a couple of those autoswitchover valves on different units. the one on my Escape would switch but not show red when it did. I used the Marshall-Excelsior version, made in USA, and have had no further problems with it.