scalding water

My Gainsborough Sovereign (came with the house & probably a good few years old) is now delivering scalding water and turning the dial just results in seconds worth of cold then v. hot again (although the pressure is ok & the low pressure is not worth bothering with - low pressure & tepid water! Is there any switch or mechanism inside that can be adjusted? Many thanks.
Asked 11 years ago by Anonymous

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 valves are not fully open then there may not be enough water
getting to your shower to cool it properly the overheat safety devicewill turn
the power off until it cools Then it all starts again

Make sure that the shower head is clean and clear,that the hose isn’t kinked (this can happen just behind the hand set where itis difficult to see) also check the inside of the hose although it can look OKon the outside it could have collapsed internally

The other possibility is a faulty flow/stabilizervalve not allowing the correct amount of water into the shower.

A rough check is to remove the shower head turntemperature control to fully hot the water coming out of the hose should be abit more than a dribble then turn to fully cold and it should be coming out atfull flow.

If there is not much difference between the two thenyou could have a faulty flow valve.

Carry out this check after you check the inlet valves.

Answered 11 years ago by The Shower Doctor

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