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Hi tony ,I checked the flow switch with a multimeter,works fine ,and the little comeing out of the diaphram,also is working, I notice the little reset button above the 2 gauges comes out,untill it is reset ,presumably as a safety to stop boiler fireing untill it is sorted,regards johnboy,

Thanks again tony ,all seems to be working ,cheers johnboy,

Hi Tony,boiler seems fine now pump is running,behaveing as it should,just to clarify earlier diagnostic, boiler fired up for perhaps ----3 seconds-----shutdown on its own ,pressure went up to 3 bar,temperature went to 80,or so,then cycle repeated, I presume because grundfoss pump not working ,it...

Tony ,thank you so much ,yes it was the pump,demounted it poured some deterrgent in plug hole and rotated it and off she went ,am very greatfull for good advise ,I owe you 1 or 2 beers ,cheers,

my ancient vokera 24/96,is acting up just before xmas,symptoms are pressure gauge climbs very hi--4 or 5 bar,temperature gauge shoots up,system shuts down,anyone have any idea,many thanks,johnboy