HAVE YOU GOT A THERMOSTATIC SHOWER the worst one is the bar type with thermostat at the end try or recessed try to isolate the cold to the shower as sometimes mains water can push into the hot side cooling the hot water from the combi the boiler will think its hot enough,
one other to try is when every thing is cold to just put on the hot water for 10 mins then go and check the nearest radiator if ist warm the diverter valve is passing
RAY
April 2007
howtomendit.com for free repair help, information and advice.
