The circulator is making some noise for the past 2 days. There is a grunt for a half second to a second sometimes when the circulator shuts off, although twice so far, it made noise the whole time it ran, which is a minute or so. I had a problem previously just a couple of years ago, a continuous, higher pitched sound, and a local dealer told me there was an oil cup on the circulator, which I found, and after several drops of oil, that was solved, at that time. I just realized that there are also 2 smaller cups on the electric motor. I found those when I tried to read some information on the motor's label. I used several drops of 10-40, and did this several times in the past 2 days. It has made noise only some of the times it ran today. If it should be the bearings, and should the wiring to it need to be disconnected, will the stoker still provide heat? I don't have the money for repairs right now, and the temp is going to zero tonight. I haven't had the money for the past few years to have the dealer come for maintenance, although I emptied the fly ash myself from the chimney.