bleecker wrote: The 4006 is the one that was installed with the boiler 6 years ago.
I can set my L4006 Honeywell Aquastat at 240 degrees--its maximum setting. My water temp never gets above 140.
The boiler shuts down at 140.
Wood'nCoal wrote: A L8124 triple aquastat will control the stoker much better then a 4006.