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Sime Friendly BF combi - no htg no dhw?

Help..

Sime friendly combi, pilot is lit, pump runs constantly, but no response to htg or hot water demand (flow switch makes OK).

Are there any sensors I can check, or is this a PCB fail?
Thorn1979, April 2011
is the orange light flashing?
most likely AQUAFLOW FILTER needs cleaning

next most likely primary thermistor

manwithnoname, May 2011
link Click here to see other fixes for Sime Friendly BF.