Rob, got your info. Your Precision Plex information panel can be reset which should make it legible again. To do so, disconnect the coach power (this is done by turning the red knob above the batteries in the battery bay behind the driver side door). Let the coach sit for a few minutes then turn it back on.
As for the water heater, if it is not already, you will need to turn it on via the Precision Plex control panel. It should be located under "Appliances" with a little fire symbol. It should be toggled on.
Let me know if that helps!
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).