On 1/15/2012 7:45 PM, BM wrote:
when i turn the thermostats on and off i can hear the circulator pumps go
on and off. the pipes that leave the boiler to the baseboard and return
to the boiler are too hot to touch. So i wonder why the baseboars are
only slightly warm. there are two zones.


Lovely, a picture is worth a thousand words. One of the two circulators
is controlled by the triple aquastat relay, the gray box. The other
circulator is controlled by a Taco relay, the green box. Your problem is
not electrical. It is plumbing, possibly frozen lines, or air in the lines.