We were on our trial run in a new to us Shamrock 23 rs. Everything was perfect. I turned on the hot water tank to shower while boondocking, got in the shower and had nothing but cold water. Got out and dressed. I rechecked everything or so I thought. Tank was full, fuses were fine, tank was firing. I even was checking the wiring with a multi meter. After 3 hours of frustration I saw it. The out flow valve from the tank was partially obscured and I never opened it. Duh. It worked great after that.
Then the poop really hit the fan. This camper was only used 2x in 3 years. It was virtually new. They never even used the fridge because they couldnt figure out how to turn it on. Our daughter was playing outside and says, " Mommy, the camper is cracked." Sure enough the fiberglass was cracked at the corner of the slide. After finding someone to fix it we learned that there must have been a water leak and rotted the frame on the entire back wall. It was not evident anywhere from the inside. Grr. Repair guy said to dump the unit ASAP. Took ahuge hit trading it to the dealer on our Jayco. Very happy now with no issues.