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I replaced the valve in my Kohler tub faucet - at first the hot water would not shut off so I took out the valve and repositioned it and now the hot water doesn't turn on all the way and the cold water doesn't come on at all but a dribbl, how do I fix it?
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You need to make sure that the small flex line going to the water supply is not kinked than if that dont work make sure theres no trash in the cartridge
First turn off the shut-off valves and remove the Forte faucet inlet hose from the cold water line. Then put a temporary inlet hose on that shut-off valve. Test how much water flows into a bucket when you open the valve. Assuming that you had good flow from the cold water shut-off valve through the supply hose, a trickle flow on one side suggests the cartridge plunger (mixing valve) or the inlet hose is blocked or damaged. Since this is a new unit, I'd recommend you replace the faucet. The best option may be to take it to the place where it was purchased (depending on the return policy).
I hope this helps and wish that I had better news for you.
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.
The cartridge has 2 or 3 o-ring type seals around it that feed the water through, it picks up both hot and cold and mixes them. Some cartridges are replaced as one, some you have to replace the seals, just take the faucet info to the hardware store and match it up. I think the diverter is for the shower. It sends the water up instead of out.
The large screw that you are referring to is a shut off valve to the manifold. If you take a screw driver and turn it counter clockwise, this turns the valve on. Also if you remove the cartridge and shut off the valve to the water heater, and turn the water off at the street and have someone at the tub and another at the street valve, you can turn the valve on slowly to see if you have water flow to the manifold. If you don't have water coming through, then you have to call a plumber out. If you do, turn the water off at the street and replace the cartridge and turn the water back on and try again. If you still don't have water and the stop valve to the right is on, then there is something wrong with the cartridge. Make sure that the cartridge is not install upside down as well. Sometimes it's impossible to install upside down but I thought I would cover this just in case. When all else fails, call Kohler they have an 800 number for tech support and also a lifetime warranty on their faucets. Hope this answers your question.
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.
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