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    crn's Avatar
    crn Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 10, 2011, 01:06 PM
    Honeywell Thermostat Rc Terminal
    I installed a new honeywell RTH7600D thermostat and connected the Red wire to the Rc terminal instead of the R terminal and left the jumper in as the manual suggested. Is it possible that it shorted out the transformer in the Furnace?

    Because even thuogh I have correctly now connected the Red wire to the R terminal, I have no power to the thermostat.

    I even re-installed the old carrier thermostat that was working before and it gets no power. When I move the thermostat upstairs, it works fine.

    Any thoughts?
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jul 10, 2011, 05:59 PM
    Very possible you`ve fried the transformer,, remember always any time fooling with tstats /or low voltage(24V) always turn off power to furnace
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