I have an aqual trol rj -cul model swg. This is the model that does not have an external flow switch. That being said, my no flow indicator light stays illuminated. This issue started after replacing the main circuit board due to other issues. It is my belief that they have sold me the wrong c/b as it has obvious differences from the original. I have searched and I am unable to locate an original board for this equipment. Not sure where to go from here, I have also replaced the cell which didn't help. Any possible help would be appreciated.