We have a Mira Excel shower, which was fitted last September. At the time it was fitted we had an old back boiler, which has since been replaced with a new Worcester combi boiler.
At the time of fitting the plumber assured us that, with a combi heating the system, the pressure would be dramatically increased from the poor flow with the back boiler; "that'll be the best shower you've ever had", I seem to remember him saying.
Well the combi did improve the flow, but by not enough we feel. Also recently, the shower has started to dramatically increase it's flow during a shower (perhaps to the pressure it should always be at?) for a few seconds and the water is ice cold. Then it returns to it's no-so-good pressure. This happens even after the shower has been on for a good few minutes, and happens maybe two or three times during a shower. Invigorating but not what we want!
So, what could it be? Air in the system? Faulty shower/boiler? Plumbed wrongly? Any other ideas??