Hot water in both F&E & CWSC

[Sanke]

Hi everyone
Just had a call from a customer. She used her new shower (new ground floor extension) for the first time today & then noticed that the overflow was runnning. it has been running all day & she has just checked both tanks in the loft, both are hot & the surrounding pipes are hot. Anybody come across this or know what is causing it ? Or any ideas what to check etc ?

 

[wnjswozo]

what type of shower,ie if a blending type cold water pressure could ,if shower faulty be going up to f&e tank,if heating /hot water on then may be normal all surrounding pipes are hot,need more info

 

[Sanke]

Thermostatic mixer, fed from same pipework as rest of new bathroom. If it is faulty how does this make both tanks fill with hot? She used the shower & did not comment about it not working correctly

 

[stevetheplumber]

are there seperate overflows or does the cws over flow into the f&e tanks not that unusual is the hot water from a mains supply?

 

[Sanke]

Not sure about overflows, I will check tomorrow. Hot & cold are fed into the bathroom from the H&C under the kitchen sink