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