SOURCE: Not enough hot water
Some higher end models do have an adjustment that is behind the face plate. You would have to remove the handle and the screws in the faceplate to expose them. If you have adjustments they will be located on the brass valve body facing you. You will need a flashlight and a flathead screwdriver to make the adjustment. If your model is not equipped with adjustments you could have a faulty valve stem. The stem is comprised of a rubber band like gasket that separates port holes into which the waters flow. There could be some piece of trash blocking the port not allowing adequate water from the hot side into the valve.Some valves stems are also able to be installed upside down causing the same issue as the ports do not rotate fully to allow adequate supply. However you say that you have adequate pressure on the hot side but not warm enough. There is another possibility also based on the way the shower supply was plumbed but there is no need to go into this unless this does not resolve your issue. I hope this is of assistance and thanks for using Fix Ya. Please let me know if I can be of further assistance.
SOURCE: low pressure and flow on hot water side of single handle faucet
It could be one of two problems, one simple, one serious.
If you have steel pipes you may be experiencing reduced flow due to corrosion in your pipes. Reduced hot water pressure in the kitchen faucet is usually the first sign since this is the faucet that is most used in the home.
Repiping is a job for a professional. Another symptom you may need a repipe is orange colored or rusty water.
SOURCE: Pressure problem with Kohler shower faucet??
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
SOURCE: faucet issue
Sounds like it was installed upside down or the cartridge is installed improperly
SOURCE: No hot water pressure on kohler bath / shower faucet
Try draining the system and apply air pressure (min 30psi) to each faucet. Open other hot water faucets to allow pressure to vent. Next try draining and cleaning the hot water tank.
If you have good pressure at the water faucet close to the shower and low at the shower then the shower valve needs rebuilt. If you have low pressure at all then start going down the line toward the water service coming into the house looking for where the low pressure starts in the distribution system and you should be able to isolate the problem.
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