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I've got hot water in the sink and stand-alone tub... but not in shower?

My house was built 7 years ago and uses all Kohler fixtures... early in the morning, I only get lukewarm water out of my shower -- meanwhile really hot water will pour out of the sink and stand-alone whirlpool tub in the same room... but usually the second person to take a morning shower has plenty of hot water? Do I need an exorcism???
  • February 03 2010 - Milford
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Answers (8)

Kohler fixtures of this age has two components, the exterior component is usually not the cause of any problems.  It is the interior component that is causing this problem.  Usually debris will enter the hot side more so than the cold side.  When it does this, it restricts the flow of water through the hot side.  This is why you are experiencing the lukewarm water affect.  The fix is to replace this internal component.  Parts like this can be obtained at a plumbing hardware store and not your local Home Depot/Lowes/Dixieline. 
  • September 09 2011
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Profile picture for shapiroamg
Its been 7 years since the question was asked. I hope its fixed by now.
  • September 01 2010
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  • gvw3
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It's the valve. I had the same problem several years ago...
  • August 31 2010
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sounds like a problem with the mixing valve on the shower body. This is inside your wall,  so you may have a little project on your hands. Good Luck
  • August 31 2010
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FunnyBoyd simply alternate who goes first!

Kidding aside.. those "Kohler Mixers" are indeed temperamental (no pun intended) and the cartridge can be adjusted, cleaned or replaced to respond in a more timely manner. However, if you never opened one up before, be sure to call someone who has... they're difficult to reassemble.
...
Those symptoms are most likely in the shower valve assembly.
  • March 11 2010
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Profile picture for petpluto

As Scott says, it's probably the mixing valve.
But it could be a few different reasons.
Newer shower valves have a "pressure balance" cartridge inside, so if there's any sediment in the pipe, or a sliver of copper, or even a piece of solder, those things could effect the cartridge.
Too, as Scott mentioned, have a professional look at it.

Good Luck, and e-mail me if you need something, this is my profession.

  • February 08 2010
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You might have a problem with your mixing valve in the shower. For some reason it might be sticking closed and takes a while to "loosen" up and allow proper mixing. Another item to check would be the temperature setting on your hotwater heater. If the water in the hot water tank is too hot it might be triggering the safety section of the shower mixing valve and not allowing too hot a water to be mixed. This is a moderately skilled repair and a few special tools & knowledge are required. Ask This Old House had a video segment on this issue last year I believe. As with all plumbing the services of a licenced plumber is highly recommended due to the potential for injury & property damage if you don't know what you're doing.

Hope that helps :) - check back and let us know how you make out.
  • February 03 2010
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Not an exorcism but a plumber would be good!
  • February 03 2010
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