[CA] [CA11] I70s Erroneous Temp Reading Underway

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Sadey,

Please click here to view a FAQ addressing temperature source prioritization within systems featuring more than one water temperature sensing device. In this case, it would appear that their is either a fault within the instrument transducer's thermistor or within the iTC-5's circuitry. When the problem is observed, check the resistance of the thermistor and compare it with the information found here. If no problem is determined with the transducer's thermistor, then it would be recommended that the iTC-5 be sent to Raymarine’s Product Repair Center to be bench checked / serviced.