My ST4000+ control head will no longer switch to Auto mode. When I press the “Auto” key, the screen will momentarily display “4000 WHL” at the top then switches back to standby mode. In standby mode it doesn’t display rudder direction indicator at the bottom of the screen either. It does show the same heading as the chart plotter. I have the fast heading sensor and rudder reference unit installed. Worked perfectly for years. It passed the functional, operating sense and Seatalk interface tests. It does the same “4000 WHL” display error when I do the wind transducer interface test. I also cannot find the Dockside Rudder Calibration Screen in the set-up menu. How do I fix this?
I’ve been reading up on other ST4000+ failures and I’m not very hopeful. If I must replace with the EV-100, does this mean I have to replace the fluxgate compass and fast heading sensor too?
