Harman Invincible insert, manual ignition, control board and esp probe change approx. 4 months ago. Stove has been operating without issue since November. Cleaned out the inside, including burn pot (done weekly) and started the stove without issue. A little more that 12 hours later woke up to the stove sounding louder than normal. Noise sounded like grinding/whining/bad bearing sound from behind the trim panel. Turned the stove off since we were leaving for the day. When we relit the stove a day later there was no noise upon start up. Approx. 30 minutes into running stove started making the noise again, adjust distribution blower a couple of time to see if it made a difference- no related change in noise. After about 20-25 minutes the sound stopped on its own. Continued to run fine, no lack in heat output/change in flame height/feed issue. About 2 1/2 hours later the noise started again. Have since bench tested all components individually. The only one that seemed to make an unusual noise was the combustion blower- slightly slow to start up with a growl to it. Ran component for approx. 20 minute with no other unusual noise. At a loss as to what could be making the noise and don't want to throw a bunch of money into unnecessary parts. Any additional tests we can run??? Any suggestions, etc would be appreciated!
Can't figure out what is making a grinding/whining noise (Harman Invincible Insert)?
- Thread starter HarmanInvicible
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GeHmTS
Feeling the Heat
GeHmTS
Feeling the Heat
Mt Bob
Minister of Fire
Probably got ash inside the combustion motor itself,or the bushings are very dry.Fan should spin by hand very free,make no noise on start.Heat will affect it,close tolerances.Blow motor out with compressed air and lube bushings.
We haven't been running the stove because of the noise. Just relit it to see if I can catch the noise on video.
Mt Bob
Minister of Fire
On that model you probably have to squrit or spray along the shafts,some have oil holes,do not know on your model.search on this site bound to find as it is almost a harman site
Did you take off the motor from the bottom of the insert and we're the gromets in good shape? Are the blower cages in good shape on the dist., and convection blowers? If it sounds like a air noise when was the last time you took off the side, inside, panels, and chased or cleaned out the inverted u shaped channels. I'm just trying to cover anything that MIGHT be causing your issue. Things that come and go are tough to figure out. Your positive it's not coming from the auger system? Has the air chamber under the burn pot been cleaned, emptied, recently? I'm thinking you have an obstruction of some type somewhere that changes with air harmonics.
GeHmTS
Feeling the Heat
Did you run in test mode as suggested? Test mode separates out feeder, blower, etc… After one minute, combustion motor will stay on to simulate low burn rate.
The stove gets shut down and entire interior gets cleaned including the burn pot air chamber. After relighting the stove yesterday it did not make a single unusual noise? Ran for at least 12 hours with nothing out of the ordinary?
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