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A call to Ravers would probably answer my initial question but their technical help is only available to CORGIs. Competent non-CORGIs have to discover things the hard way. I was hoping that this Forum would make things a little easier. I will try cleaning the NTC though ... might even buy a...

Thanks for your continued interest Tony. The gas supply pressure is stable because I have checked it but it is worth checking the NTC. If its response is slow then it would certainly effect the modulation of the gas pressure. I will check it out and come back with the results. Ken

Yes, they were the first things I checked and they are indeed correct, but thanks for the input. I am interested in your comment about these settings being beyond many CORGIs and find it quite concerning if it is true. Incidentally, I am not a CORGI, I am a 61 year old electronics and...

The NTC's seem OK but thanks for the input. If you have seen a lot of these boilers with this sort of problem then perhaps I am heading for a redesign of the controller that they could all benefit from.

You obviously didn't find the info useful and hence the unhelpful response. Incidentally, I have a colleague whose boiler cost 4 times as much as mine and in less than 2 years he has had to pay more than £300 for a new controller board so price isn't everything. In the main I'm reasonably happy...

I have a Ravenheat RSF84ET boiler which I installed about 3 years ago and whilst the CH side is fine, the DHW does not control as well as I would like. Incoming water temperature is about 15C at the moment and if I open a tap to a flow rate of 8 L/min then with the thermostat set to max the hot...