Sometimes, it's like the dealer is working against you.
Took my trailer in as it had a water pump and water line issue.
I had winterized it from the last time I had it in, just a few days before.
When maintaining your trailer, my theory is anyway, good habits will save the day. Do things a very specific way and always do them that way. It helps reduce mistakes.
Anyway, when I winterize, I leave the valves closed to the hot water tank. It keeps back flow of anti-freeze out of the hot water tank, etc.
When I get it back, the valves are open. Can't think of a reason the dealer would need to open these. Hot water tank didn't need to be involved in this maintenance.
Also, the clear hose for sucking in the anti-freeze is full of anti-freeze and tucked back inside.
Who does this. That is a mess waiting to happen. If you pull that hose out and aren't aware that fluid is in there, it will leak all over the inside of the trailer. Like you need that mess.
Sometimes I just don't know.