Replace the tub faucet.
Because heat rises and obviously upstairs is higher than downstairs so the heat will rise to upstairs.
Temperature balance shower body needs to be adjusted
Check the upstairs taps for blockage in aerator or internally.
You first have to be a member and then go and buy a new house with a upstairs! Easy.
it sounds like there are crossed lines. if there is no water upstairs there has to be a valve that is off. even if there is low pressure it would eventually fill the line and you would get some water.
the kitten is in the farm house on the right, go upstairs and click on the hot water knob in the bathtub and the cat will jump out.
Is the water not hot? Or no water coming out the hot tap? not comming out at all
If the plumbing in your house is old, it is probably rusty water pipes or rust from within the Hot Water heater. Des Perado
old pipes in the sink or tub upstairs
it is the medicine cabnet upstairs
a level 3 house