My 2012 Ultrex on a boat I bought last year will randomly not work with the foot pedal but if I put on spotlock will work. Head spins fine but pedal won’t move it in manually. I can run it with the remote. After five minutes sometimes ten it will suddenly start working and work the rest of the day and for the next ten trips, then out of the blue it does it again. Sometimes first stop of the day, next time after 10 stops. Any ideas?