I have an 899 at the console and an 898 at the bow. I switched transducers and using the compact on the TM. Yesterday, I noticed that the temp reading on the 899 was showing a reading from time, depth or another readout on all the screens. I checked the settings and it was set for temp. If I changed it to another reading then switch it back to temp, it would read the temp. The 899 was left on all day and throughout the day, it would repeatedly do it. Today, it no longer switches the temp to another reading but now just reads odd temps like -1 degree up to 9 degrees and it is F. The 2d just would not show arcs at all. I tried using 200/83, 200 and 83. All it will show is dots. I have sped up the speed, changed the sensitivity all the way to max and it doesn't really change much of anything but the bottom. Screen stays fairly clear of any arcs (or dots now in my case) but the DI and SI will show a good number of fish below. I even tried turning on the fish ID and it would only show a few dots still.
Does this sound like a bad transducer or the unit itself? I should have swapped out the 2 units to see what they'd do on the other transducer but didn't really think about it on the water as I wasn't too concerned with the temp. The unit is under warranty but the transducer is from the 898 and isn't. I won't be back on the water for several days and it is going to drive me crazy trying to figure out which is causing the issue. Hoping someone on here like Wayne, might have some knowledge of the issue.