Which side is opposite where the Auto Change-Over Regulator is?
Is that the cylinder that doesn't flow when other one goes empty?
Red Top Regulator on cross over line has failed.
It takes high cylinder pressure and controls it to 30# in line that goes across front of trailer
*Required when long line is used otherwise if at full cylinder pressure the propane vapor could condense into liquid propane which will ruin your auto change over reg and if liquid gets into LP System it can ruin appliance gas valve
RED TOP Reg has failed....not your auto change over reg.
And YES the lever is for cylinder indication NOT for change over operation
