vaillant boiler Home › Forums › Members Only › Trade Professionals › vaillant boiler This topic contains 1 reply, has 2 voices, and was last updated by Selgas 12 years, 5 months ago. Author Posts 17 Jan 2007 at 2:28 am #279755 gabbie the circulator pump only runs when the burner is on . also, the burner sometimes drops out for a second, and then relights itself. [electronic ignition] 18 Jun 2007 at 8:17 am #301616 Selgas And…….. you want to know what??? Selgas Services LtdCraftsman Gasfitters, Plumbers, Electrical Service Technicians Author Posts You must be logged in to reply to this topic.