Thanks steve all your input is much appreciated, can you tell me the best way to connect the hotoutlet direct to the combi? do you need to make up a bit of pipe or is it easier than that? I have now changed the HW flow switch and must admit the problem still remains. would you class replacing...
Steve, I have been told it is the heat exchanger by my boiler engineer... although I did have doubts - when i was told the boiler must be replaced, more to add... I have found that: when the DHW is turned on, the flow is half of what it should be (since the last three days), and you can tell...
When any tap in the house is switched on, regardless of CH on or not, the flow of the hot water stays low (half - compared to what it has been), the water quickly boils up (very hot) and then the boiler decides to turn off (possibly on over temp.
when the above happed the system pressure gets...