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    W5TOM's Avatar
    W5TOM Posts: 1, Reputation: 1
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    #1

    Nov 21, 2018, 06:03 AM
    HVAC squirrel cage blower whistle noise.
    I just had a motor replaced in a HVAC squirrel cage air blower. The blower now makes a kind of whistling sound along with the normal moving air sound. The sound seems to pulsate and is annoying. I know the technician has the rotor off center. I.e. there is a big gap on one edge of the housing and a very small one on the other side. Could this off center positioning be the cause?
    talaniman's Avatar
    talaniman Posts: 53,880, Reputation: 10852
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    #2

    Nov 21, 2018, 01:21 PM
    It well could.
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #3

    Nov 21, 2018, 06:29 PM
    Make them center the cage properly. You are getting unbalanced flow that could cause the noise you note.

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