[Tiara Coronet] How to diagnose fix Jabsco electric toilet head not working

[Sans Peur]

If the system pulled water from under the hull you need it in the water. Usually they pull from the fresh water tank. Make sure the tank has water and the pumps are on.

Heads on boats are problematic at best and will clog with damn near anything. I really don't know why they can't make one that works.