Thread: Water temperature fluctuation

Hello gentlemen, Just in a condo building that has a central water heater. The condo unit has 2 showers. The hall shower operates properly. The master shower starts out with a normal (warm) temperature than it starts to fluctuate between scolding hot & ice cold. Any ideas to the cause.
Thanks in advance.

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It may have a mixing valve which is bad.

Jerry, you forgot to post code text.

Individual shower valves. Individual shower and
tub-shower combination valves shall be balanced-pressure,
thermostatic or combination balanced-pressure/thermostatic
valves that conform to the requirements of ASSE 1016 or CSA
B125 and shall be installed at the point of use. Shower and
tub-shower combination valves required by this section shall
be equipped with a means to limit the maximum setting of the
valve to 120°F (49°C), which shall be field adjusted in accordance
with the manufacturer’s instructions. In-line thermostatic
valves shall not be utilized for compliance with this
section.

Originally Posted by Jerry Peck

It may have a mixing valve which is bad.

Originally Posted by Jeff Remas

Jerry, you forgot to post code text.

Huh???

There is code text about mixing valves which may be bad? Where?

By the way, when posting code text, which is what it looks like you did, you should first state what code and edition it is from.

Bad valve about does it