2015 Nautique. The water temperature sensor is paired up with the depth finder in a bi-ducer right below the engine. The depth finder works fine. The water temperature read out is now always 0.00 degrees. Anyone have similar issues with a 3yr old boat? The bi-ducer is a $475 part plus installation. Hard to justify the expense for something I can estimate pretty close on my own by dipping a toe in the water. Any input is greatly appreciated. I will definitely share if solved.