switches from high to low power?

Sounds like overheating due to low flow. Check the hose isn't kinked, and that the head spray plate isn't blocked with scale. Run the shower just on the hose, with the head unscrewed to check. If it still doeas it, check the supply pressure and flow rate are adequate. Check that any isolating valves are fully open, and that any inlet strainer is clear of debris and not scaled up. What area are you in? Local pressure depends on supplier and area. Are you on the ground floor of a single property, or do you share a supply (flat conversion) or live higher than the 2nd floor?

PlumbSpark
October 2009

HI There
It sounds like your temperature presser valve needs replacing if the shower is less than twelve months old it may be still under warranty
I am retired Joiner plumber/election/builder.(LT West Yorkshire)

trampus09
October 2009