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

    Nov 21, 2009, 02:43 PM
    My Honeywell thermostat went blank without any particular reason
    My Honeywell T8600D thermostat went blank without any particular reason.
    I checked the circuit-braker board and it was fine.
    I don't know what to do next.
    Thanks in advance for your help.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #2

    Nov 21, 2009, 02:56 PM
    Usually this occurs when the t-stat loses 24v power. Do you have a voltmeter?
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