Absolute 63 vibration noise

[Windshear]

I'm trying to figure out this noise that happens when the stove is ramping up to operating temperature, then disappears until the next ignition. Troubleshooting so far has been replacing the combustion fan (pellethead), cleaning fines box and removing the back panels to try to locate the source of the sound. It does not seem to be coming from the circulation fans as I don't feel any vibration from those when they are running, even when not in whisper mode. The sound *seems* to be coming from somewhere around the feed mechanism. The stove is 5 years old, with about 20 tons of pellets through it. Usually the sound is loud but sometimes it's dull and lasts for about 5-6 minutes. Full cleaning, minus flue clean also did not make a difference. Thanks.

 

[Washed-Up]

Sounds like the fan blades are rubbing on the housing

 

[Tonyray]

Sounds like the fan blades are rubbing on the housing

Yes.

 

[Tonyray]

I'm trying to figure out this noise that happens when the stove is ramping up to operating temperature, then disappears until the next ignition. Troubleshooting so far has been replacing the combustion fan (pellethead), cleaning fines box and removing the back panels to try to locate the source of the sound. It does not seem to be coming from the circulation fans as I don't feel any vibration from those when they are running, even when not in whisper mode. The sound *seems* to be coming from somewhere around the feed mechanism. The stove is 5 years old, with about 20 tons of pellets through it. Usually the sound is loud but sometimes it's dull and lasts for about 5-6 minutes. Full cleaning, minus flue clean also did not make a difference. Thanks.

Didn't say if u replaced the combustion motor also. Mine makes noise at times. I put couple drops of 3-1 oil on that rotating shaft in back of exhaust motor. Quites right down.

 

[Windshear]

Thanks. I did replace the combustion motor but not the fan blades. Come to think of it I was a little concerned about the blade clearance when I reinstalled it. I'm going to replace the fan too and see what happens.