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Posted by Helen on October 12, 2009 at 17:41:26:
Hi, I have a Potterton combi boiler (Puma 80e). Last week the Modulation PCB caught fire. On closer inspection the fire was in the top left hand corner. The tracks had burnt through. I replaced the PCB and the central heating and hot water work fine but even when the CH and hot water are not in use there is a continuous noise as if a pump or fan is running constantly. I am afraid to leave it on. Any ideas what it can be?
Thank you, Helen x
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