"fconsig" wrote in message
...
I have a newish gas forced hot water heating system that is talking
hours to move the temp in the house a few degrees. The house it
small, 1000 sf, and tight and it is only 30 degrees out.

My heating system has one Taco cartridge circulator 007-F5 and the
body of the cartridge is extremely hot and it is silent except for a
little hum on the electrical control. It is placed on the return side
of the line and there the line is warm but not hot. The radiators are
warm but not hot.

Is this normal?

Thanks

fconsig at yahoo dot com

Those circulators do get really hot and there's no way to physically tell,
by vibrations, if they are circulating. Assuming that the house is just one
zone, with one circulator, and the pump is returning water to the boiler:
After a couple of minutes at most, the pipe between the circulator and the
boiler should be at about the same temp as the boiler. There may be air in
the system, or possibly the boiler temp is set to low