Yesterday I woke up and my entire bathroom had no running water like if it was shut off by the water department. So I checked and downstairs all water is working! I have a water heater downstairs and one up stairs . The upstairs is just for that bathroom alone. No toilet sink tub or shower is running water. No one changed anything or installed anything to even shut the main shut off off for 8 months! I can’t figure it out? It’s like if some secret hidden shutt off valve upstairs that I never have seen or found before was turned off by a ghost !! Please help !Please help! No cold or hot water works but downstairs is just fine and dandy.



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since your upstairs has its own water heater then if the cold water going upstairs is interrupted then you will also have no hot up there.
as to why this happened ????
i would look for a cold water shut off going to the upstairs and start from there.

Well the main shut off is open it’s at my back dolor kitchen. But besides the ones under the sink downstairs or under toilets are the only other shut offs I looked everywhere and can’t find anywhere another shut off. I understand what ur saying but downstairs both hot and cold water works . So where do I look to see if cold water is off exactly?

does your house have a basement, crawlspace or is it slab construction ?
do you have a utility room ?

What Packy is saying is that your upstairs water heater takes cold water in. So just one pipe supplying cold water upstairs accounts for both your lost hot and cold water. If you didn't notice low water pressure upstairs before this, it seems unlikely to be a clogged pipe.

If you can't find a mystery valve in the basement like Packy suggested, search all around the upstairs water heater.