Dutch_12078 wrote:
If you can find one, the Marshall Gas Controls RCI-24 Remote Changeover Indicator is an easy add-on if you have or switch to a Marshall series 250 automatic changeover regulator. It's a simple LED device that lights up when the changeover occurs, and can be mounted inside your RV in a convenient location.
MARSHALL ACQ Remote LP Changeover Indicator
this works great, I have one. the only issue is FINDING the indicator and even more problematic is finding the regulator if you don't already have one. They went out of business some years ago, although I have now seen some of the regulators in RV stores.