high pitch

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    Heat n Glo I35F High Pitched Whine/Squeal

    We love our new Heat n Glo i35 Gas insert fireplace. However, the fan on medium has developed a high-pitched whine/squeal lately that happens often, but not always. I found a similar thread here from 2014 where the fix involved screws and sheet metal in the back housing of the unit. I'm posting...