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a high pitched whistle (or squeel) when feeding is almost always carbon buildup in the burnpot just in front of the auger. That being said, sometimes it can be a feed motor or fines container buildup.
Also to know is, why is my pellet stove making noise?
If your pellet stove is making a roaring sound during operation, you may have a problem with the balance of air and fuel inside your appliance. Sometimes this problem can be solved by cleaning your stove or adjusting the feed rate.
Also Know, how do I make my pellet stove quieter?
How to Quiet a Pellet Stove
- Shut down and unplug your pellet stove.
- Move the stove's heat exchanger rod up and down.
- Remove the cooled burn pot.
- Clear any buildup from the burn grate by scraping it with a flathead screwdriver.
- Brush the stove's blower mower and fan with a paintbrush to ensure the quietest possible fan operation.
Coil Burner Buzzing or Humming. On older coil (Calrod) burner ranges, you may hear a vibrating, rattling, or buzzing sound when the burner is used. This is due to the way the coil burners are welded. The noise produced by the vibration is often described as a humming or buzzing noise.