Kohler bathroom sink faucets are of two types, either with the handles and taps as one piece or as three separate pieces for cold water, tap and hot water. Possible problems may occur when the water does not turn on or off when the handle is turned or if there are leaks. The repair of a tap is to find the problem and the replacement of broken or worn parts. Shut off the water by closing the two water shutoff valves below the sink. One is for the cold and the other for hot water.
Use the flat-head screwdriver to remove the plastic cap on the cold and hot water handles. Remove the Phillips head screws that hold the handles. Then, remove the handles. Remove the six-sided accessory under the handles by turning counterclockwise with the adjustable wrench. This opens the valves of the tap.
Examine all metal components inside the faucet. Broken metal parts can mean the tap cannot be repaired and must be replaced. Again to place any worn or broken rubber in the plastic parts within the faucet valves. Remove the filter above the outlet of the water tap. Turn the screen to the left with your hand in order to separate it. Check for dirt or obstructions on the screen. Clean the screen and put it back in its place.