Water heater problem
When the marine mechanic dewinterized our boat he left all the breakers and the batteries on. Our water heater blew a breaker and it ended draining our batteries.
I don’t know how to start troubleshooting the water heater. As soon as I turn on the breaker it blows. My guess is water was not put into the heater and burnt up which ends up blowing the breaker.
Will the entire heater need to be replaced or what should I look to fix?