Have a ghc 10 AP on my 44 Atlamtic. While cruising last week display started saying ECU overheat shut down in 60 seconds and started counting down to shutdown. Turned unit off and now when you turn it back on you get same message. Very little Garmin support in this area, Panama City. Fl. Any ideas? Call Garmin and they said send ECU to them for exchange. Still wouldn't know what caused this to happen. Thanks for any help.
