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