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Thread: Echotechnics controller causing rvk hum

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    Quote Originally Posted by Farmer Geddon View Post
    fwir, extractor fans can overheat if you run them at less than 40% of mains power. Not enough airflow to keep them cool.
    Absolutely, at a time when the current increases to counteract the drop in voltage . The motor goes hot and is why bearings go noisey - following the grease burning off

    The bigger the fan, the more heat capacity and can take it but these cheaper smaller, often plastic fans get it bad.

  2. The Following 4 Users Say Thank You to gardro For This Useful Post:

    Cannabug (31-01-21), Farmer Geddon (31-01-21), GEORGE (31-01-21), Mac (31-01-21)

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