I have a question concerning the temp. setting on my Lowrance graphs. There are two settings for temperature: one says water temp. and the other simply says temp. When I put the water temp. on the page, it blinks 32 degrees F, all the time. When I choose temp, it puts a temp. on the screen that is the actual water temperature. For example, it read 49-52 yesterday on Texoma which is what other boats had. This also could not be the air temp. because it was 21 degress yesterday morning and 48 in the afternoon.

My problem and question is that I don't(knowingly) have a temp. sensor on the boat that runs to the transom and my trolling motor transducer is the 101 minnkota with the universal sonar that doesn't have a temp. sensor. So where am I getting this reading?? It is the same on the bow 332 and the console X-25 which are linked.

After further inspection here's what I get:

1)I select MENU and go to OVERLAY DATA and hit SONAR DATA and then WATER TEMP. Here, I get the blinking 32 F on the screen.

2) When I go to NEMA 2000 and check TEMPERATURE, I get an actual reading on both graphs.

????????