No hot water pressure on kohler bath / shower faucet

Is the hot water pressure good at other fixtures in the house? I'm guessing your newer valves have a scolding adjustment that is set very low. Check the instructions that came with the valve assembly.

My first suggestion is to have the installation plumber return to adjust the faucet to function properly

If the faucet was working before and then just stopped, it is the mixing valve or a clogged supply line.
turn the water off and remove the mixing valve. Turn the water on and see if you have good flow from both hot and cold ports inside the faucet.
Caution- this procedure can get messy, close the shower curtain or door.
Call Kohler and ask for a new mixing valve for free.

Take handle back off and see if it has a dial that can be removed and repostioned. take off and move it about 1/4 turn counter clockwise and reinstalled and try to see if mixture is correct.

Can you remove handle , behind handle there should be a dial to move to increase hot or cold supply.

Remember where you start and remove it and replace a 1/8 to 1/4 turn counter clockwise, just put handle on try it and see if it changes and adjust accordingly.

adjust ur anti scold the setting is set to low when single handle shower units are shipped they are set in cold mode for safety ur install/instructional paperwork explains such and also advises on how to adjust---remove handle and on shaft will see a blue and red plastic clips that are adjustable slide towards u and move red for more hot water test water continue till comfort level is reached for hot water

u hve to adjust the temprture ring i think u put it all the way so u lock it ,

Sounds like it was installed upside down or the cartridge is installed improperly

Hi pglaw,

My best guess is the supply valve for the hot side isn't open all the way. This valve is right on the valve and is accessed by taking off the front cover plate. This would still allow the pressure balancing valve to let water through but then you would have a small flow on the hot side.

If this isn't it then then cartridge is bad.

Please rate this response and good Luck,, phil

This is a pressure balancing valve that needs both cold and hot water pressure to operated. It is an anti-scald safety operation.

Good Luck, Phil