I had a problem with a leak in one rad - turn boiler off - drained all rads - fixed rad with leak - refilled system - boiler came on & after 5 mins switched off (on it's own) - tried re-lighting boiler no luck - could there be an air lock inside boiler or something else!
boiler: potterton 100e

max, October 2006

AIR IN BOILER OR TRY BLEEDING THE PUMP.IF AIR TRAPPED IN PUMP THE WATER IN BOILER WON'T CIRCULATE AND THE BOILER WILL OVER HEAT AND TRIP.

HI-SPEC PLUMBING, October 2006