"PipeDown" wrote in message


Sure sounds like the pump is not doing the job. You can check to see if
AC is sent to it and you should still be able to tell if it is running by
feel or by peeking in a vent hole in its case.

The pump motor and pump (impeller) itself should be considered seperately
when troubleshooting because either can fail independent of the other even
though they look like one unit.

This sounds like the most logical explanation. Especially if it has been
sitting inactive over the summer things like that tend to pop up at startup
time.

BTW, you don't have a furnace, you have a boiler. Furnaces heat air,
boilers heat water. Using the wrong terminology will get nothing but
disrespect if you go to the plumbing supply house for a part.