Shower goes cold...

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Steveg91

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Hey folks, While taking a shower, it'll go cold periodically, then back to regular, then cold, etc. We have a large water heater. THe shower valve is single handle, could it be the valve??

Thanks,
Steve
 

Jadnashua

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You could have some crud in the line that is moving back and forth with pressure changes, or tumbling, changing the amount of hot that gets to the valve. Is the pressure changing when this happens, or only the temp?
 

Redwood

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You may have an older non pressure balanced mixer. If someone else in the house uses water the temperature will fluctuate.
If you do have a pressure balanced mixer the balancing valve may be stuck.

What do you have for a mixer valve?
 
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