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we tried a new gas valve, (had one in stock) but made no difference. we have aslo checked all pressures, all ok. no problems with inlet pressure or govenor either, its been changed.

out of interest why are they recommending a powerflush?? what are the problems.

Hi all, we have a boiler ten years old and after ignition can go into a rapid sucsession of momentary main burner shut downs, these only last about 1 second. the pilot stays alight. we have changed the electrode and lead. PCB, air pressure switch, and the case seal all appears to be in good...