Hello all, looking for tips on my no hot water issue. 19’ Mallard M185. Has it winterized by camping world last fall. I’m sure I’m doing something wrong but feel ive looked at everything. How does the water get in the hot water tank? I fill my cold water & cold water comes out of both hot & cold faucets. I only turn the electric water heater on for a few minutes & same w/ propane b/c I’m nervous to possibly do damage IF there’s not water in hot water tank. Prob. Something simple but any help is appreciated... Thanks in advance!