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    Potterton Kingfisher MF RS50 - overheating and clicking

    Many thanks for the replies to my query and apologies for taking time to respond. It turns out the fault was the PCB after all: had it replaced a couple of weeks ago and everything is now running fine again. I took apart the old one and there are definite black marks around the base of some...
  2. C

    Potterton Kingfisher MF RS50 - overheating and clicking

    Hi all I'm looking for some advice / views please. I have an old (installed 2000) Potterton Kingfisher MF RS50 boiler that has developed an intermittent fault. My system is gravity fed with a cold water tank and header tank in the loft and a single zone switch which - I'm told - is why I can...
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