Glow worm 55F (Fuel saver F) Will ignite and run for a couple of miutes, go out for a couple of minutes, then the boiler will start up again. It keeps on doing this. Repeating the cycle.The CH, & Hot water are not being heated. The wall thermostat is not set too low.

Carl, November 2005

had same problem try the overheat stat

rick w, January 2006

Same symptoms on mine resolved by a new Thermistor Control - part number 2000802635

Andy Beach, November 2005