Rumbling on cycle start after warm day

Steve Garson_2

This afternoon, I was in the mechanical room of my basement when the oil burner started. The system rumbled loudly, with the atmospheric draft control vibrating loudly.

I put my hand over the draft control opening and felt pressure coming out around the sides of the damper. After a few minutes, the rumbing stopped and everything sounded normal again and it has been normal since.

The system was just tuned up last week. Could this be due to the chimney being cool after not having the burner run all day?

Any ideas?

Weezbo

it needs to be cleaned and retuned*~/:)

if you have a leaky nozzle and the burn is fairly constant it burns the excess oil off for the mostpart ,as soon as it starts to run with longer cycles the"residuals" come back for the pay back.

Bill Nye_2

Did

Did it do that before it was serviced? Did the service person do a combustion test? Or set it "by eye" ?


Get 'em back to check it out.

Steve Garson_2

I watched the technician do the entire tune up. He went completely by the book and I watched everything. He tested the draft (~3), the CO, stack temp and calculated the efficiency at 85%. He was quite careful.

jcarta

rumble

the rumble was a possible result of the chimney not producing any draft due to the warm day-after the burner ran for awhile the chimney warmed up and produced a draft- the burner operation smoothed out and the rumble will go away

Steve Garson_2

Sounds like a logical reason. The sounds was rather scary, but it only happened that one time.