On Oct 19, 6:43*pm, "Ed Pawlowski" wrote:
"LSMFT" wrote in message
Jim
It's a wood boiler and I do it that way manually now and it works great..
The problem is that when the fire goes down the circulator runs all the
time unless I shut it off.

Sounds like you need an aquastat to control the circulator. *It will shut
off below a set water temperature.

Pointless unless the boiler has a thermostat.