2007-12-18 23:15:05 · 5 answers · asked by Amanda C 2 in Home & Garden ➔ Maintenance & Repairs
You can get a knocking noise when the furnace is having trouble breathing. this means that an inlet damper is loose or the exhaust is plugged a little bit. This is a matter for a repair man to come and address.
2007-12-20 04:56:41 · answer #1 · answered by skibm80 6 · 0⤊ 0⤋
The belt to the squirrel cage could be loose enough to "slap" sounding like a knock. The bearings to the cage. It could be just dirty, shut it down and take it off for a through cleaning. Don't forget to change the filter and oil it good, not with WD-40 that's a cleaner not an oil.
2007-12-19 00:04:24 · answer #2 · answered by cowboydoc 7 · 0⤊ 0⤋
properly maximum engines will rattle some precise after an oil substitute for some seconds until the oil gets back to each and all of the moving factors. If the sound lasted greater suitable than say 10 seconds you have a project. it would desire to be lifter noise, it would desire to be considerable or rod bearing noise. With 214k on it i've got self belief a ineffective hydraulic lifter that's no longer pumping back up with oil making the noise. additionally confirm you used the marvelous quantity of oil, and examine the dipstick in the previous initiate as much as confirm its finished to the mark on oil.
2016-11-23 14:38:11 · answer #3 · answered by Anonymous · 0⤊ 0⤋
May need to get the furnace cleaned.
2007-12-18 23:23:20 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Possibly a demon or the spirit of a deceased plumber.
2007-12-19 03:32:27 · answer #5 · answered by Shizzle 3 · 0⤊ 0⤋