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Plumbers Arms member
Plumber
Gas Engineer
Went to see about a strange flow problem from a combi today.
The hot water is on "e" hot water settings and water temperature goes from hot to warm.
What would this be ??
Any ideas?
Could it be the control switch?? IMG_20160127_195319.jpg
 
It's sited in the kitchen right next to the sink.
Constantly running hot from that point.
Get to the bathroom and water temperature goes hot then warm then hot again up and down!..
Piping isn't lagged but that doesn't matter as the temperature raises hot and warm??
 
Actually never touched it as I'm just back now from there.
Was thinking that it was a thermostatic mixer and check the outlet at the hot. But turns out as bath mixer tap and temperature rise and going warm.
Tried turning the setting to number 4 and then got really hot. And again goes to warm and back up to piping hot.
 

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