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29 year old Coleman Gas H/A will not shut off... Installed new CT-30 Honeywell 2 wire Thermostat single temp control. The unit works but will not shut off unless I pull fuses & shut off Braker

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  • ebysan Aug 21, 2008

    I wired the White wire to the W & the Red wire to the R. A Technician at Honeywell said there is no polarity so it did not make a difference where the wires went. I called because I had purchased another honeywell with a shut off. The Technician said I had the wrong Thermostat...I needed a simple 2 wire unit. I went to 6 stores before I could find a CT-30 unit...Thanks!
    I am having a home Safety Inspection on the mobile tomorrow morning to allow me to sell the Mobile Home.  A few weeks ago it was 104 degrees out side ..I had the temp set on 55 with heat lever depressed. The heat came on & would not shut off...We have been doing a lot of repairs to the home including sanding the kitchen floor that as adjacent to closet of heating unit. My husband bought me a Hunter thermostat...I called the Technician before installing because i only had 2 wire coming through the wall..She told me there was a jumper installed & i could install this but it ha a cool cycle & a heat cycle plus an off ...The unit would work on heat or cold but would not shut off 

  • ebysan Aug 21, 2008

    I did not take the front off of the unit in closet...I did not see inner stat...could ther be dirt on inner stat causing the problem?

  • Gary Davd
    Gary Davd May 11, 2010

    one other ting if this ia a furnace (gas) and has an A/C with it you cant use a 2 wire stat

    Same is true if it is a pkg unit

  • Gary Davd
    Gary Davd May 11, 2010

    Well maybe you can look at this and it will help you

    R=Red wire Hot 24V

    W=White wire usally goes to the heating side or W1

    G=Green wire this controls the fan realy (blower inside)

    C=Common wire can be any color mostly black test here and red to get 24v

    O=Orange wire only used in heat pump systems for rev. valve

    RC=Red terminal for cooling

    RH=Red treminal for heating

    Y=Yellow feeds power to turn on the outside unit (at Contactor)



    Hope this helps

  • Gary Davd
    Gary Davd May 11, 2010

    can you post the wiring you did

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All coleman gas units is incoperated with a secondary inner stat. It resembles a pie with numbers on its outer edge. Usually silver and the numbers span from 50 to 300 on the top and likewise on the bottom. You must not turn it clockwise. Refer to specifications of manufacture to allow proper function.

Posted on Aug 21, 2008

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