In the upstairs shower the faucet works fine on cold sending water to the tub side and to the shower side.. when the faucet is turned to the hot setting water does not come out of the tub side or the shower side.. any suggestions

Hi Jim,

Sounds like the hot water inlet ports of the cartridge have got clogged up with crud or mineral build up from your heater. The answer is to shut the water off and pull the cartridge and clean out the ports. However if it's mineral build up from your heater it will just happen again unless you flush your heater out on a regular maintenance schedule. Let me show you how to flush your heater. Attach a hose to the boiler drain at the bottom of the tank. With the pressure on, open the boiler drain and let it run until the water runs clear. You will see a spurt of red,(rust) and some white grains,(lime or calcium carbonate). The whole thing shouldn't take more then a few minutes. Don't forget to flush it out every month. Your heater will thank you for it. You might want to consider cleaning the screens on your areators if you have a high mineral buildup. If thev problem still persists after you have flushed, you will have to drain the heater, remove the boiler drain and go up in the bottom of the tank with a wood or plastic rod, (not metal) and try to break up the mineral and flush it out. Good luck, Tom

Thanks Tom... and the cartridge is removerd with a slotted screw driver correct?. and the water heater was replaced about 1 month ago.. it was 7 yrs old and rusted out thaks for the cleaning tip

"the cartridge is removerd with a slotted screw driver correct?"

To answer that I need the brand name and tha age of the shower faucet.
Also replacing the heater could have dislodged some mineral build up on the pipe walls that's not clogging the inlet ports. Regards, Tom