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  1. #1

    two wires for programmable thermostat?

    Hello,

    I bought a house in March '11. It has dual zone heating running off baseboard (AC is run through vents off the upstairs programmable thermostat). The downstairs zone is an old thermostat that I was hoping to replace with a programmable. When I pulled it off the wall it had two wires attached. I went to Home Depot and the sales person said a programmable only works if there's three wires. My friend, an electrician, said that's not true and two wires would suffice. I've tried researching the web to no avail. I was hoping someone here would be able to help?

    Your help is greatly appreciated in advance!

    Edit: not sure if this should go in here, please move accordingly.
    Last edited by Suarez7; 01-15-2012 at 12:24 PM. Reason: noted

  2. #2

    programmable thermostats, duplicate thead

    Duplicate post - apologies
    Last edited by Suarez7; 01-15-2012 at 12:50 PM. Reason: duplicate

  3. #3
    Join Date
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  4. #4
    Join Date
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    For heat only, 2 wires will work fine, read the instructions and make sure power to the unit is off, if you have problems, call your electrician friend.

  5. #5
    Thank you, sir. Seems HD employees got it wrong yet again...

    Nice rifle in the avatar. Not a .50 cal, right?

  6. #6
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    Duplicate threads are not permitted. Please don't make duplicate threads, thank you.
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    How many times must one fix something before it is fixed?

  7. #7
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    Dang it Jim ! you beat me to it

  8. #8
    Join Date
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    Quote Originally Posted by Chris_Worthington View Post
    Dang it Jim ! you beat me to it
    You were reading that long winded thread, that is ready or ARP.
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    How many times must one fix something before it is fixed?

  9. #9
    Join Date
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    Quote Originally Posted by Suarez7 View Post
    Thank you, sir. Seems HD employees got it wrong yet again...

    Nice rifle in the avatar. Not a .50 cal, right?
    M14, 7.62mm

  10. #10
    Quote Originally Posted by mlstark View Post
    M14, 7.62mm
    ...should've recognized from Call of Duty. Thanks again

    @Mods - Sorry for the duplicate posts.

  11. #11
    Join Date
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    Charleston, SC
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    Any digital thermostat, programmable or not, that is unit powered will need 3 wires unless it is a "power-robing" thermostat. A battery operated thermostat, programmable or not, can use the 2 wires.
    "Customer Service" is not a department, it's an attitude!
    ???

  12. #12
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    Use a Honeywell pro6000, battery powered.

  13. #13
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    Quote Originally Posted by cartercrew View Post
    Any digital thermostat, programmable or not, that is unit powered will need 3 wires unless it is a "power-robing" thermostat. A battery operated thermostat, programmable or not, can use the 2 wires.
    There is no way a 2 wire system can be power robbing... it has to have at least 3 wires to use one curcuit that is not powered to complete the ground. It will have to use a battery operated stat or run a new set of conductors.

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