Worcester Greenstar highflow 440 reset?

hi if you want to reset the boiler remove the cover ul find a red sqaure buton hold down for 10seconds then release that should reset the system i would look at a wider picture ie the thermostat,the valves seals and possibly the plate may need replacing please contact a heating engeneere if any of the above problems ar suspect thank you

c.mathieson
December 2009