Hi All - question; the flow light has been red for a few weeks, so I purchased a new flow switch. Before replacing it, I did the test by cutting the wire and twisting the red and black wires together. Turned the cell back on and the light remained red. From what I understand, that means the cell is bad. Does this all sound right? Anything I'm missing? Really wasn't looking forward to spending $800 to replace, it's only 3 years old. Thanks for your expertise!