I have a two story house with two bathrooms up stairs... One is a jack and jill and the other is a single full... The Jack and Jill has hot water at the two sinks with good water pressure but no hot water to shower... I am guessing it is the valve clogged on that one... However the single full has no hot water to the sink or shower with low water pressure or at least not as strong as that in the other bathroom.

Any ideas on why no hot water to this one bathroom?

To help I need the brand name and a description of the shower faucet and every other faucet tyhat's affected. Back to you, Tom