DIY Doctor

Thermostatic Bath and Shower Mixer tap Problem

Postby Juandan » Wed Sep 18, 2019 5:36 pm

I have a thermostatic bath / shower mixer tap running off a combi boiler, I have had It few years now, the temperature is set to 38 It runs fine nice steady temperature for having a shower, but I can't make It run colder, I can get It hotter but not colder, I can press the red button down and turn temperature control anti clock wise to make It hotter, but when try to turn It clock wise It will only move a little, It won't turn all the way to make colder.
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Simply Build It

Postby KitchenGuy » Wed Sep 18, 2019 10:39 pm

Sounds very much to me as though the hot and cold pipes on the thermostatic valve are fitted the wrong way around. It's normally anti-clockwise for cooler and the red button is a safety button so you cannot accidentally turn the temperature above 38 degrees, it's certainly not to make the water cooler.
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