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Ahh there's your problem Woolf, if you throw such language at your boiler then of course it's going to break down - you have to be nice to it - remember while all the other boilers were being bought at full price the only way this one got sold was on special offer! (Hope everything gets...

Hi Woolf - tell me about it!! Thanks SueBeebies - I have just replaced the old style (inside the pipe) DHW & CH Thermistors with the new style clip on ones - and all is well!! (hopefully these ones will last a bit longer as I have already replaced the others a couple of times!) Thanks...

Hi UF6, Thanks for your reply. This has only started happening recently so frost protection could make sense - is this normal or could it be a problem with the frost temp sensor making it kick in when it's only cold instead of proper winter cold? What sort of temp does frost protection...

I have a problem with a Ravenheat CSI 85 (26 months old) which intermittently runs the pump even when i have not requested DHW / CH. It can come on anytime during the day or night stays on from between two and twenty minutes then switches off. The boiler does not try to light and other than...

Hi Just installed a new temp sensor and i now have hot water! Hurray! Thanks very much for both your help (going to keep my fingers crossed about the heating not coming on on its own any more..). Louis

Hi Tony, Thanks for the advice that sounds like it would make sense! I am going to replace the DHW sensor and check(again)/replace the DHW demand switch&wires - will post the results! thanks, Louis

yes, sometimes during the day or night you can hear the pump running and occasionally it fires up but never for long (the radiators get luke warm) this happens even when the timer is off - this only started happening in the winter and i thought it could have been some sort of frost control but...

Thanks ChrisR going to order a HW Sensor today - i just didn't know what the next step was as i have tested the microswitch&wires back to PCB with a multimeter and they are all ok. When i run the hot tap the microswitch is pressed and it goes straight off as soon as i stop the tap. Could the...

I have a problem with a Ravenheat CSI 85 (18 months old) which will only give DHW when the CH is on. If turned to DHW mode the boiler will not fire. I have checked diverter valve which is operating microswitch ok when hot water tap is running and also checked that microswitch works and...