OIL FIRED FLOOR MOUNTED BOILER, HEATING OIL RAN OUT , SINCE THEN WEVE FILLED UP TANK , PUT CONTROL ONTO CONSTANT THE RED LIGHT ON THE BOILER SWITCH KKEPS POPPING OUT WHEN THE BOILER IS TRYING TO IGNITE ,, HAS THIS GOT AIR LOCK ,, IF SO HOW DO I PURGE IT

WILL, January 2009