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

    Jun 27, 2010, 04:33 PM
    New thermostat ac runs on heat setting
    Replaced a honeywell with a honeywell digital model CT877SC. 5 wires, R to R with jumper between R and Rc, Y to Y, G to G, B to B and W to W. AC will not run in AC mode but on heat setting. Only flashes snowflake on AC mode. What is wrong with this thing? Do I need another jumper somewhere?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 27, 2010, 08:37 PM
    Did you do the switch setup settings like in the manual. Here is your manual


    http://customer.honeywell.com/techli...it/69-1676.pdf
    jansanjur's Avatar
    jansanjur Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Jun 27, 2010, 10:58 PM

    Yeah, I did all that I am wondering if I got a bad thermostat. It still is not working right.
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