We have an Alpha CD32C an have no hot water. This was only put 3.5 years ago and in that time we've had a new pump, Fan assemble I think every switch replaced and now we have lost the hot water again. is this a common problem with this boiler. We had a similar problem at the turn of the year. Then our plumber did a powerflush. Our heating works fine being 26deg outside it would. But on hot water it sounds like an old kettle then trips out. I've tried different temp settings. does anyone have any idea's. Thank you