Connect the water heater shower no hot water, but the washbasin with hot water, is not the shower problem?
There are two possibilities: one is the shower damage, the other can be connected with the shower valve is broken. You can remove the shower head, if the hot water that is the shower damage, if not hot water that must be a bad valve. hope this helps!
If it is the first case, you go to the sanitary ware shop to buy a new shower can (silk mouth common). If the second case, with a photo phone, take the sanitary ware asked to buy, the best package to install. (If you do not understand repair or demolition, it is best to find arbitrary maintenance, here is not good to leak
