neither the change-over valve indicator on my Casita
or my Escape
ever worked right. it would usually switch over, but the indicator would continue to show green.
finally got a new complete regulator+change over assembly last year, a Marshall Excelsior MEGR-253, and that's worked great since getting it. when it shows red, I flip the lever to the other tank and it immediately shows green again, I then remove the dead tank, and its really empty.