Hi Renee,
On my 2001, 29', the water heater is in the rear streetside corner of the trailer. However, with your trailer having the front kitchen, it might be located near the front. Just look on the outside bottom half of the trailer for vents. The refridge vent is plastic and has large horizontal slots while the water heater vent door is metal with smaller slots. Once you have found the water heater, make sure there is water in it. Hook up a hose to the water supply and open the pressure relief valve on the outside (behind the water heater door). If water comes out, then you are ok. If not, go inside where the tank is located and turn the by-pass valves on (located by the water heater) so that both handles are pointing in the direction of the water lines. This allows the water to flow into the tank. Your unit should be the electric/propane model. Look on the control panel, usually mounted by the refridge, and locate 2 switches that say "water heater a/c shut off" and "water heater DSI". MAKE SURE WATER HEATER HAS WATER IN IT before turning either switch on. With the trailer plugged in to shore power, the heater a/c shut off switch, when turned on, will heat the water with electric elements. With the propane turned on, the DSI switch will automatically light the heater using the propane. You do not have to manually light the heater. It is not advisable to heat the water with both switches turned on. You probably need to sanitize your water lines and flush out the water tank. Hope this helps you out.
Bob