Purchased a new 2014 Prowler 29PBHS this year. The literature says the gas/electric DSI water heater is a standard feature- listed under the Prowler value package (required). I could not find the switch to turn on the electric function (yes- the gas switch is in the bathroom on the main control panel). I looked up the part number shown on the heater- Atwood G6A-8E. It says LP only. Is this an error made during the manufacturing of this RV?