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    cvenable's Avatar
    cvenable Posts: 2, Reputation: 1
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    #1

    Nov 14, 2010, 05:44 PM
    Can I connect a honeywell rth2300 thermostat with only 2 wires coming out of the wall
    I am trying to install a honeywell rth2300 programmable thermostat, but there are only 2 wires coming out of the wall and attaching to the old school thermostat. Will I be able to install this thermostat or do I need a different model? I am connecting only to a furnace, no ac. Thanks Po
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Nov 15, 2010, 03:28 PM
    There was a similar post a day or two ago. Heta only; Red goes to RH and White goes to White. From the manual I saw, you need to remove the red jumper that is between RC and RH. Should work. Hope this helps. Brian
    cvenable's Avatar
    cvenable Posts: 2, Reputation: 1
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    #3

    Nov 15, 2010, 07:36 PM
    Hi Brian,
    I spoke with Honeywell help desk, but they weren't able to assist since the old thermostat didn't have any letter designations for the terminals that the white and black wires from the wall were attached to. They suggested I trace the wires back to the furnace. That I did with the help of the furnace installation manual. A bit more investigation and I determined that the black wire was the red wire and white wire was in fact white. All hooked up and working fine.
    Thanks so much for your help.
    Cindy
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #4

    Nov 15, 2010, 09:24 PM
    Comment on cvenable's post
    Hey you're good! Thanks for your comment. You can "tip" me by clicking yes! -is this helpful. Glad we could help.
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