A very interesting problem. The last two times out fishing the temperature reading would not stay steady, jumping from 25 to 95 degrees. After each trip, with boat in driveway, I turned unit on and it read air temp correctly and when transducer was submerged in water it also read steady and correctly. Even put an ice cube on transducer and temp dropped slowly and steady and when ice was removed temp rose slowly and steady.
Any ideas?
Bayou Basser