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I need help with my central heat and air unit, it has a heat pump. the model number is GQ3RA-036K. I am changing the theromstat out and the wires are connected to it. there are eight wire colors that are orange,light blue,black, red, yellow,brown,green, white. on the new thermostat are letters that are r,w,y,g,l,b,o,e,aux. Which ones go where?

Answers :

Normal\015\012 0\015\012 \015\012 \015\012 \015\012 \015\012 \015\012 \015\012 MicrosoftInternetExplorer4\015\012 \015\012\015\012\015\012\015\012\015\012\015\012 /* Style Definitions */\015\012 table.MsoNormalTable\015\012\011{mso-style-name:"Table Normal";\015\012\011mso-tstyle-rowband-size:0;\015\012\011mso-tstyle-colband-size:0;\015\012\011mso-style-noshow:yes;\015\012\011mso-style-parent:"";\015\012\011mso-padding-alt:0in 5.4pt 0in 5.4pt;\015\012\011mso-para-margin:0in;\015\012\011mso-para-margin-bottom:.0001pt;\015\012\011mso-pagination:widow-orphan;\015\012\011font-size:10.0pt;\015\012\011font-family:"Times New Roman";}\015\012\015\012\015\012 \015\012\015\012 \015\012 \015\012 \015\012\015\012Thermostat wire color codes\015\012explained.
\015\012Please note. Not all installers use the proper color codes when they\015\012install or replace equipment. It may be necessary go go to the furnace or\015\012outdoor unit to verify what wires are for what purpose. Also be sure there are\015\012no splices in the wire that could change the wire colors between components.
  • R (red)\015\012 or Rh (Red heat) 24 volts from equipment.
  • \015\012
  • Rc (Red\015\012 cooling) 24 volts from transformer in cooling equipment.
\015\012\015\012Note: If only furnace has a\015\012transformer and cooling equipment does not jumper Rc and Rh.
  • W (White)\015\012 sends 24 volts to furnace control to start the heating cycle.
  • \015\012
  • W2 (no standardized wire\015\012 color, usually whatever wire color is available) controls second stage\015\012 heat.
\015\012\015\012Note: W2 is most often used\015\012for heat pumps to control what is called emegency heat or Auxillary heat, and\015\012most often will use the white wire.
  • Y (yellow)\015\012 often (blue) is used, controls cooling\015\012 unit (outdoor condensing unit) also is used for heat pump heat.
  • \015\012
  • Y2 (no standardized wire\015\012 color, usually whatever wire color is available) controls second stage\015\012 cooling.
  • \015\012
  • G (Green)\015\012 controls the fan "on" operation of the furnace/air handler. Also\015\012 often is used to start the blower for many electric furnaces.
  • \015\012
  • C (common)\015\012 most often brown but can also be black or other color available to\015\012 installer.
  • \015\012
  • O (orange)\015\012 Energizes heat pump reversing valve for cooling (Trane and most other\015\012 brands).
  • \015\012
  • B (Blue)\015\012 Energizes heat pump reversing valve for heating (Rheem, Ruud and\015\012 Weatherking).

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I need help with my central heat and air unit, it has a heat pump. the model number is GQ3RA-036K. I am changing the theromstat out and the wires are connected to it. there are eight wire colors that are orange,light blue,black, red, yellow,brown,green, white. on the new thermostat are letters that are r,w,y,g,l,b,o,e,aux. Which ones go where?

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