Author: steveng Your Xtreme Heater is designed for unattended, fully automatic operation. That said, it is always a good idea to check on your boat periodically. If you have suffered a power loss on your dock, you may want to check to make sure no circuit breakers have been tripped with restoration of power. You should test your Xtreme Heater annually, but otherwise your heater is maintenance free. Was this answer helpful ? Yes (0) / No (0) Can the heaters be installed upside down? Can it be mounted on a hatch door?