Have a Utica steam gas fed bolier that shuts down every so often and wont kick back in with a call for heat. The quick fix that always used to work would be to cycle the power on and off to the entire system. This seemed to always get the call for heat going. The low water cut off is operating as well as all electrical controls (transformer etc..) Can't figure this out.
first you should check(tighten)any and all electrical terminals both on the power side and the controls up into the stat if it is not consistantly happening(certain time but random) might be a loose connection...something is bouncing.shut the boiler off and flush your low water limit might have mineral buildup or garbage inside it... here's their site might get something off it http://www.uticaboilers.com/