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

    Jul 8, 2007, 05:07 PM
    Programmable Thermostat
    Hi..

    I have the EWC-ST-2D which I want to replace with Programmable Thermostat from Honeywell. The current list of wires are yellow, blue, red, white, green and brown. On the programmable thermostat, I have R, Y, W, G. But where does the Blue and Brown go. I do have Y2 and W2 and C. Appreciate any suggestions.

    Thanks
    Bye
    XenoSapien's Avatar
    XenoSapien Posts: 627, Reputation: 42
    Senior Member
    		  
    #2

    Jul 12, 2007, 04:49 PM
    Don't attach the blue and brown anywhere. Fold them back into the wall, and hook-up all the other wires. Test everything; heat, cool and fan modes. If they all work, then you'll be OK. The brown and blue from my experience are for additional furnace options. If you do this, let me know what happens.

    XenoSapien
    rangankrish's Avatar
    rangankrish Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Jul 16, 2007, 06:48 AM
    I have a second thermostat to which there should be a relay from the primary thermostat. I thought the blue and brown plays a role in that. I would like to know where that should be connected.
    XenoSapien's Avatar
    XenoSapien Posts: 627, Reputation: 42
    Senior Member
    		  
    #4

    Jul 16, 2007, 08:17 AM
    Probably does somehow. I work strictly with the four wire system. Hopefully they will keep your question open for a while so that someone who knows what you have can answer.

    XenoSapien
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
    Ultra Member
    		  
    #5

    Jul 16, 2007, 06:27 PM
    Can you provide more information? What type of system do you have ? Heat pump or gas furnace? Where did the wires hook to the old thermostat? Mike
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