Hello everyone, I have a major problem need help if possible. I have a garman 5212 new in 2009 this is the 3 temp sensor put on the boat note all sensor were from garmin. when replaceing sesnor the unit works for about 4-6 months then turn unit on and temp is blank replace sensor and unit works fine. Check all wiring from sesnor nothing broke or seem to have a problem. call garman and they said they don't have a problem with the sensors, of course. Just wondering if anyone esle came across this problem thank you all...