While you wait for answers, we may have found some information which could help you.
Click here for Electric Shower Hot Water Temperature
Clean shower head?
Gainsborough 2000x leaking from bottom of copper cylinder ?
How can I fix my Gainsborough ps1200 shower???
Gainsborough Impulse 9.5 electric shower?
how do you remove font cover from a gainsborough 9.5kw deluxe electric show?
Gainsborough 8.5 se hot/ cold water problems ?