sonu
First check that the inlet filters are clear (Part 8)http://www.showerdoc.com/brist-parent-121-bristan-aqueous-thermostatic-bar-shower
and that the check valves (part 10) are not sticking.
If these are OK then you will have to remove the flow valveand check that it is operating properly (part 11) (they seldom go wrong) the more likely faultwill be the temperature cartridge (part 5)
Answered 12 years ago by The Shower Doctor
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