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    Smc30's Avatar
    Smc30 Posts: 1, Reputation: 1
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    #1

    Sep 24, 2012, 05:42 PM
    Totaline signature PV110 thermostat buzzing
    Unit is almost ten years old. Buzzing 24hrs/day. Not related to heating or air operation, just always buzzing.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Sep 24, 2012, 07:57 PM
    Unit is almost ten years old. Buzzing 24hrs/day. Not related to heating or air operation, just always buzzing.

    Most of the time the buzz is caused by loose plates in the low voltage transformer. Replace transformer and the noise should go away OR sometimes you can shim under the transformer to tighten the plates up a bit to stop the noise.
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