Ed, Jim, Bill,
Thanks to all. My next task is to open the plumbing bay faceplate, and check out everything. The photos that Ed sent, make it pretty clear the sensors are behind the faceplate. We are presetly in Madison for the FMCA Rally, and if I can find replacements for the sensors, I will buy them just to have. Since we only have electric here, I cannot remove a sensor. I am pretty sure I will wait till we get home in late August to tackle the problem.
Thanks again guys.
Paul