Maybe she hit the road. Maybe she cleared the blockage and it blew her far far away where Shrek lives.
This thread reminded me of an issue our in-laws had with their MH. The hot water would not flow. To start with, when we were in there with them and they mentioned it, my first thought was the strainer on the sink, but then i thought no because the cold will flow. Well he decided to unscrew it and check it anyway. What can it hurt. Now you have to know him. It's foot to the floor or asleep. No in between. So this strainer wouldn't unscrew. So he decided oh yes it will and super unscrewed it and broke the whole end of the kitchen faucet off. About half of the spout was left. it was all I could do no no die laughing. The MIL did not think it was funny. Well we could now get a great view of the strainer and it turned out that it was a fake strainer. And now if you turn on the faucet it shot you right in the chest..
So, my next suggestion was its probably some junk in a check valve somewhere. I asked when was the last time you drained your w/h. The answer to that is I don't think you drain it on these. So we proceeded out and drained the w/h. A white slime was blubbing out for awhile. very gross. I flushed back up in the hole with a sprayer on the hose and got as much out as I could.
Magic. Hot water was flowing again.
Fast forward to the next morning. Wife hollars at me to go out there. he's messing with it again and cussing and throwing stuff. They are parked in our front yard, btw. Hot water had stopped again. This time he had decided it was a vent problem and that you needed to get air into the w/h so water can come out. He was in the process of drilling holes, but remember, everything wide open. His style of drilling is to push a drill bit so hard that it goes right thru without spinning. He had several holes started that happen to match all the bits that we're broken. I told him that would probably be a bad idea as hot water will probably spray back out on him. I can't imagine what really would have happened if he was successful.
We (I) found a check valve under the coach, behind the w/h. It was full of gunk. I cleaned it and all was well again.
The next day, it stopped again, so they drove it 2 hours to a dealer, stayed overnight while they put in a new check valve. By the time they got home that evening, the hot water had stopped again.
I finally convinced him to stop. I went the next day and got a check valve at a local plumbing store that you can easily open up and clean, and then took my pex tools and relocated the check valve to a spot you can easily get to. It never stopped flowing after that.