While you wait for answers, we may have found some information which could help you.
Click here for Shower Power YearsBoost mode stuck on after a power cut?
Aqualisa Quartz digital shower ?
How can i mend my aqualisa digitalpumped shower unit?
How can we stop whirring noise when turned off?
Aqualisa Axis Digital, Lights permanently on but no water ?
Aqualise shower?