I have a thermostatic Triton Power shower (installed in 2008) which is fed by the cold water tank in the attic and the hot water from the cylinder. The hot water has a Flexcon 12L pressurising cylinder in the central heating circuit. I am finding that the pump on the shower won’t work on most mornings – usually okay later in the day. When this occurs I check the hot water taps and it seems to be that there is a low hot water flow rate. I have checked the Flexcon cylinder pressure and cleaned out the filters in the shower. I’d be grateful for suggestions as to what to try next?