Temp variation and unable to stop
Also left runnning for 3 or 4 minutes and then it is unable to switch it off at the shower, and the override switch has to be used.
After changing the pcb, would the failure to press the flow valve to purge the heater element cause this, or is there something else as well ?
Many Thanks in advance
Sounds like you may have a water flow / pressure problem.
The things to check first are.
1 That the main valve coming into your house is fully open.
2 Then check that the valve on the line to the shower is fully open.
If these are OK then you could give your local water authority a ring and ask them what your water pressure should be, they will probably say that the supply a minimum of 1bar (the minimum required to operate a shower)however press them and ask what it is likely to be first thing in the morning (when everybody is showering)
They could have the pressure turned down because they are working on the main, or because there is a burst pipe some where and they have turned the pressure down to try to save water, or the pressure maybe low just because there is a burst pipe somewhere, that hasn’t been discovered yet!
Answered 12 years ago by The Shower Doctor
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