(March 2, 2014 at 5:13 pm)professor Wrote: Today I took mine outside and did the same thing- lots of house dust left, along with half the fan noise.
I think the extra load on the fan motor is the source of the loudness, and when it is clear, the noise and load goes down.
I think if the sensors report a high temperature the fans are spun faster to compensate. Dust will make make it harder for the air flow to take the heat away. I don't think a dust on blade stresses the motor causing noise, if that's what you meant.
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