IC40 flow switch was no longer coming on. Was told to jump Red/Black wires together and flow light should turn green - didn't work. Removed switch and checked Red/Black wires with meter with switch closed - reading open circuit. Ordered new flow switch and having same problems.. flow light won't turn green when Red/black jumpered or reads open circuit when testing with meter. Could it be another bad switch or something with cell. Cell is clean and switch is installed in direction of flow.