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The shower faucet will no longer allow it to get as hot as possible-as hot as it's been before

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  • gina4marykay Dec 27, 2008

    after taking the faucet handle off and messing with it a bit, the problem seems resolved. must be a valve problem, hope it's not a warning of bigger problems.

    thanks

  • JPproblem Mar 04, 2009

    I have the same problem.  When you turn to the central knob to hottest setting, it's not hot enough.  All other showers and faucets in house are ok.  Just the master bathroom shower.  The water heater is fine.  Shower handle is hansgohe brand.  When I take the faucet and plate off to look at valve, it is single valve from what I can tell.  How do I adjust to make it hotter mixture?

  • Ray Coon May 11, 2010

    What make of Shower Valve is it?

    Are you experiencing any other problems with the water getting hot at other fixtures?

    sanray

  • phil_m7 May 11, 2010

    Hi Gina4marykay,



    Does the rest of your home's hot water still get just as hot as before. It could be the water heater or the shower valve itself.



    Please follow up with details, Phil

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  • 68 Answers

Hi Gina4marykay,

Does the rest of your home's hot water still get just as hot as before. It could be the water heater or the shower valve itself.

Please follow up with details, Phil

Posted on Dec 28, 2008

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Shower temperature fluctuating and will not stabilise


You haven't provided much information to help narrow down the source of the problem.

Is the flow of both hot and cold water flowing freely? Are the water lines not clogged internally with corrosion or residue? Is it possible that the water is being diverted such as in an apartment building or to an outside spigot (sprinkler system) or kitchen faucets (dishwasher)?
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If I understand correctly, you have single handled shower faucet.
Normally there is a wait for hot water to arrive at faucet.
But now hot water is already at shower faucet.

Single handled faucets have a mixing area inside valve where hot and cold come together before going into sink.
This mixing valve can have crossover where the hot and cold can pass through to each other even when faucet handle is off. When single handle faucets get old, this can happen.
How it happens:
For example another faucet is turned on inside house, and pressure differential between hot and cold causes hot water at shower handle to pass through mixing area and into cold water line.
So if another faucet has been run, then that lets hot flow to faulty single handled shower faucet.
To confirm this is the problem: turn on other faucet and put ear against shower faucet to listen for moving water.
This condition may also signal there is a water leak.
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There is a restriction in the faucet or the piping to the faucet on the hot wtaer side...this will be very hard to find and fix... The shower uses less water so it will get hot.... the tub spout allows more water flow so you cannot get the water more then warm...

Take the faucet apart and blow out all the passage ways with air... also run some water from the piping while the guts are out of the faucet, to flush the piping...
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