While you wait for answers, we may have found some information which could help you.
Success
Message
Almish heater surge model w15?
Aquadart shower seal?
Mira excel thermostatic shower mixer?
Boiler over pressure on the hot-water side?
Mira advance atl electric shower?
Fasco?
Grohe push button flush?
How can I mend my Neptune Exotic shower?
How do I fix it?
Thermal cut out switch?
Replace cord in shower screen?
What parts do i need to get water flowing again?