I replaced our original regulator several years ago, and used a Marshall Excelsior, and when it's in the green position, I can still see some red, but when it goes red, no green is visible, and it works just fine. Just to test it, with both tank valves open, turn off the tank valve that is currently feeding the regulator, and it should automatically switch internally to the other tank and at the same time the indicator should turn full red. If it does this, don't worry about it, it's working just fine. If it doesn't work this way and your trailer is still under warranty, get it replaced. This is what our indicator looks like when in the green position. It goes full red with no green showing when the tank goes empty.
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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