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    Grammy's Avatar
    Grammy Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 3, 2007, 12:38 PM
    Honeywell TH8000 thermostat
    This thermostat was installed only 8 months ago and has worked fine until last night. It began a humming sound and the thermostate vibrates. What is causing this? The heater is working fine and all displays are normal. It is just this loud sound that is emitting from the thermostate itself and the vibration that is new.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Mar 4, 2007, 02:54 PM
    Never heard of this problem before and I have been around the heating trade for many many years.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member
    		  
    #3

    Mar 4, 2007, 07:53 PM
    Sounds like something is loose inside and responding to the 24 volts AC. Do you have a warranty on it?
    Grammy's Avatar
    Grammy Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Mar 5, 2007, 06:19 AM
    The thermostat is under warranty. I have left a message with the installer and hope to hear back from them today. Thanks for your insight.
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