This is my first time de-winterizing a trailer (a 2021 243bhs) and I've run into problems I'm hoping someone can help me diagnose if I can DIY fix, or need to haul my unit back to the dealership (which I'd *really* like not to do!)
Step by step:
Wet bay had both valves (winterization and heater by-pass) set to the labelled OFF position. It was my understanding these are often mis-labelled. These are how they came from the dealership last fall.
Photo:
https://imgur.com/XJHF47n
2/3 filled the fresh water tank. Remove hose.
Turned on the pump.
Turned on cold tap. Nothing happened.
Flipped the Winterization valve from OFF to ON. Pump tone immediately changed, then after a few seconds stopped.
We now had water, and proceeded to drain each cold line and outdoor tap.
When we came back around to the wet bay, it was soaking wet, including water on the ceiling. My wife called that there was water inside the trailer on the floor - it seems there was some explosion of water in the wet bay, enough to force water up into the camper.
We notice that the city water infill, which we have yet to use, is dripping when the pump is on.
Next up, we hooked up the hose to the city water inlet
Turned on all hot lines, which flushed.
Noticed there was air in the pipes, no matter how long they ran.
Noticed a "buzz" noise from the city water infill any time there was a tap on.
Video, with audio of the noise:
https://imgur.com/edg66cU
Sounds like a leak? Bad city water infill valve?
I'm not hugely DIY savvy, but I'll have a go at fixing it myself to save a trip to the dealer. Thoughts?