Townesw Posted April 16 Share Posted April 16 For years our MaxxFan 7000K has made a high pitched chirping noise at lower speeds. I had been told that it was due to pulse width modulation speed control so I didn’t try to fix it. My wife can’t hear the noise but it really annoys me. I finally googled and found this video. I cleaned the brush dust out of the motor and now the fan is pretty quiet. Be aware that black dust will come out of the motor when it is disassembled so you might have someone hold something under the motor as you pull it apart. 7 3 Bill and Martha 2018 LEII Hull 313 Original owners 3/14/2018 2019 Chevrolet 2500HD Duramax Link to comment Share on other sites More sharing options...
Townesw Posted April 29 Author Share Posted April 29 Update: The chirping started again after about 2 days. I ran the fan on the highest setting for several hours and now the fan is quiet again. 2 Bill and Martha 2018 LEII Hull 313 Original owners 3/14/2018 2019 Chevrolet 2500HD Duramax Link to comment Share on other sites More sharing options...
Jim and Frances Posted April 29 Share Posted April 29 Thanks for the info and the brush dust warning. Don't you just love these little gremlin issues!! 1 SE Texas | 2021 Elite II Twin Bed # 927 "Lucy" | 2019 F250 FX4 6.7 Link to comment Share on other sites More sharing options...
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