filling a bath takes forever, cold water flow is at approx.20L/min. With temp setting at mid range flow rate at hot water tap is approx 5-6L/min. I realise that combi's have to heat the water, but this seems really low. It has always been like this . Thanks in advance.
after checking the above, try removing the cold feed pipe to the heat exchanger, there you should find another restrictor with an o-ring, remove the o-ring (somtimes swell). this might improve the flow.
Big A
December 2007
First check that the cold water inlet valve is fully open, if so then check if there is an inline filter may be blocked