My 2007 20SSV has the digital display for depth and water temp, but both failed to work this weekend when i took my boat out for the first run of the year. They both are displaying but fail to change. The depth is stuck at 3.3' and the temp at 32 f. Is this some kind of default setting? Does anybody know how to troubleshoot the system? I assume that these are built into the paddlewheel plate on the bottom of the hull since i didn't see anything else sticking down off of my boat.