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    safety1's Avatar
    safety1 Posts: 2, Reputation: 1
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    #1

    Nov 18, 2007, 07:24 PM
    Installing a digital thermostat
    I have a high eff. Furnace, no A/C. I would like to change out the old round dial Honeywell for a digital/programmable. I have a red and white wire out of the wall and the posts I have read say put the red to Rh and the white to W or W1. Sound right? The instructions sure don't cover it. Thanks in advance.
    SABREMAN's Avatar
    SABREMAN Posts: 18, Reputation: 1
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    #2

    Nov 18, 2007, 07:33 PM
    Quote Originally Posted by safety1
    I have a high eff. furnace, no A/C. I would like to change out the old round dial Honeywell for a digital/programmable. I have a red and white wire out of the wall and the posts I have read say put the red to Rh and the white to W or W1. Sound right? The instructions sure don't cover it. Thanks in advance.
    Mine is red to RH on therm.. white to w on therm.. but you have to use black jumper.. between rh and rc

    Mine is a LUX brand , works great...

    Hope it helps you
    safety1's Avatar
    safety1 Posts: 2, Reputation: 1
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    #3

    Nov 18, 2007, 07:42 PM
    Quote Originally Posted by safety1
    I have a high eff. furnace, no A/C. I would like to change out the old round dial Honeywell for a digital/programmable. I have a red and white wire out of the wall and the posts I have read say put the red to Rh and the white to W or W1. Sound right? The instructions sure don't cover it. Thanks in advance.
    Thanks SABREMAN, the LUX is the one I looked at and it does have the jumper also. I had not heard of the brand so I held off until I got some answers here.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #4

    Nov 18, 2007, 09:02 PM
    If you only have 2 wires, make sure the new thermostat doesn't need a common for power.
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