Fishfinder temperature display stuck on 99.9 degrees

General

Question

​My fishfinder temperature display is stuck on 99.9 degrees.  How do I correct this?

Solution

​It sounds like your problem is in the temperature sensing circuit of your transducer. It could be a shorted wire in the cable, a cut, or the actual temperature sensor has gone bad. You should check all of your transducer wires and connections. If everything looks okay, contact your local authorized Furuno dealer.