How could I have hot water in half of the house and not the other?

Question

I have hot water in one bathroom and not the rest of the house. When I turn on the hot water in the kitchen I have full pressure but the water never heats up. In the second bathroom, I have no water pressure in the sink (hot or cold) but full pressure in the shower (but with no heat). I cannot figure it out.

Answer 1

Does the sink with little pressure have a single handled mixing valve? The fault could be in that valve. If you can turn the water off to just that valve(both hot and cold) that may solve the problem. If not try isolating other valves including the working one in the first bathroom. If there are no shutoff valves for these lines you will have a heck of a time finding the problem. You also need to turn off the supply to the washer to isolate the fill valve as these valves can cause this problem as well especially if it has three solenoids for auto temp. control.

Answer 2

I would look for a secoND shot-off valve. 1st a line split coming out from the water heater. 2nd look for in line valve in the bathrooms. also some Faustus will let out water from the hot side even if there is no hot water pressure. good luck.

Answer 3

The hot water is shut of to that part of the house. Most likely it either has a bypass or the hot and cold lines did not get plumbed in right to that area.

Answer 4

Depending on your faucets, it sounds like the hot water has a shutoff between the water heater and these spots in your house. If your faucets don't have individual hot and cold water knobs you will have a hard time telling.

Answer 5

You may have calcification in the lines that just started closeing them, it has to start somewhere. You'll have to follow it and find out where. You may have to go as far as changing the lines. I've seen this before where you couldn't put a lead from a lead pencil in a line it was plugged so bad.