Water temp quit working ???

I was wondering if anyone knows what would make the water temperature reading quit working on a finder. It's a Eagle Cuda 250, it's less than a year old and still under warranty, but I can't find the receipt. The water temp quit on it when it was a couple months old & always reads 32* now. I was going to replace it since lately it will not read depth at over 5-10mph, but after reading the post about making a splash guard for transducers I figured I would give that a shot & if it works I would like to have the temperature reading tobe correct also. Thanks for any help.

Tim