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I'm trying to change the thermostat and hook up the wires but the heat does not turn on How do the wires need to be hooked up?

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  • Anonymous Jan 17, 2009

    IM TRYING TO CHANGE MY THERMOSTAT BUT THE OLD ONE HAS 7 WIRES AND THE NEW ONE ONLY HAS HOOK UPS FOR 5

  • Perry Putnam
    Perry Putnam May 11, 2010

    What kind of system do you have?(heat pump, gas furnace and A/C)

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Here is the basic wiring diagram for a gas furnace thermostat

Red wire to R terminal
White wire to W terminal
Green wire to G terminal
Blue or Yellow to Y terminal


Posted on Jan 17, 2009

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Hi I have a hb2400vd2m20 air handler and need to know what wires are needed to hook up to my thermostat its a Honeywell, as of the moment there is no heat pump it just the air handler running. I know there...


Honeywell 5000, 8000, 8000 iaq, prestige, round dial analog, digital Honeywell redlink. 1 heat 1 cool thermostat 3 heat 2 cool thermostat. does the stat u have do conventional a/c and heat pump. red wire is hot wire 24 volts not heating its your 24 volt control power. this will be r on your board and t-stat and red wire. y is for cooling mode and is yellow and will be noted y on both board and t stat. green is fan on the indoor furnace and will be g on board and t-stat and the wire is green. blue is the common side of the transformer labeled b on both board and t-stat. I did not see brown on your schematic I looked up I seen orange which is your reversing valve wire for the heat pump whether its calling for cooling or heat this is what changes the flow of Freon to make it to the indoor coil as warm Freon or cold when called for in heat or cool. the thermostat if a vision pro 8000 needs to be programmed in the installer mode which if this is the t-stat u have u need to read through the heat pump section. the green hooked to the orange doesn't look right on the print but that's the breakdown. http://www.manualslib.com/manual/277678/Haier-Hb2400vd2m20.html?page=11#manual heres your schematic

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How to hookup Auxiliary heat (and/or use an extra wire at the thermostat)


They don't always use the correct wire colors,if it is labeled w it is for your strip heat,shouldn't hurt to hook it up,most likely they used it for the strip heat,most heat pumps are wired to turn on your strip heat when the heatpump is in defrost mode and it is controlled by the heat pump,you can hook this to the emerg. heat or w2 :)

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Gooman ck30-1t need help wiring thermostat to unit


Hello, on your thermostat you should have terminals Y,G,C,R and W and each terminal should have a wire. Typically y is yellow, G is green, c is blue,R is red and W will be white. If there are only two wires at the thermostat this means heating was only used in the past and new 18/5 thermostat wire must be run from the control board to the thermostat

Jul 02, 2012 | Goodman Heating & Cooling

1 Answer

HAVE A HONEYWELL THREMOSTAT TH8000 NEED WIRING HELP HEAT IS COOL COOL IS HEAT


Most of the time the white wire hooks to W and the yellow wire hooks to Y....... W= Heat Y= Cooling In any case if you are getting Heat when you set the thermostat to Cooling....... Turn the furnace off at the ssu or main breaker and then ... Pop the thermostat off of the subase and switch the wires that you have on Y with W and put the wire from Y to W.... Here is some more information on how a typical thermostat is wire in the pdf..... Hope this helps...

Here is a pdf for the installlation manual for a Pro 8000
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Does CPLE18-1B unit revering valve needs to be


the easy way to check this is . turn the fan to on ... next on the unit outside turn the power off take the orange wire off turn the power back on and run the unit and see what happins if it cools with the orange wire off then hook it up to term o . if it heats with the orange wire off hook it up to o .

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AC unit not kicking on...


You need a "Y" terminal. "Y" is pretty standard on every heat pump. It is the wire that will energize the compressor contactor at the outdoor unit, allowing the compressor and condensor fan to run.

Apr 03, 2010 | Heating & Cooling

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Wiring instructions for Thermostat Honeywell with Carrier Package


Jumper R to Rc and hook hot wire from transformer to R usually red wire
O = Reversing valve probably white or orange If you get heat when calling for cool or Vice Versa then switch wire from O to the B terminal.
Y = Contactor usually yellow
G = Blower usally green
Jumper Aux to E need to go to unit and use the wire that goes to your Auxiliary or 2nd stage heat
L = Light if you have this terminal on your unit then hook it up.
C = Common from transformer usually black, if you have this terminal on your unit hook this wire up.
Make sure you go to your unit and only hook these wires up if they go to these locations.

Jan 11, 2010 | Heating & Cooling

1 Answer

Our fan for the intertherm p3ra-024k will not shut off. We have put new wiring from thermostat to unit. He pulled the green wire like the serviceman told him to when he serviced it and it still keeps...


You have a problem with the wiring somewhere it could be in the thermostat. When the service man said pull the green wire off that was the power to the fan. The thermostat should wire up as red to the R terminal on the thermostat this is the 24 volt feed to your thermostat and to the unit. The white wire should hook up to the W terminal on thermostat. This white wire is to the heating section of your furnance it activates the heat mode. The yellow wire hooks up to the Y terminal on the thermostat this is the outside condensing unit control for the a/c. The green wire should hook up to the G terminal on the thermostat this is your fan wire that activates the blower in your furnance If this wiring isn't hooked up as such then your problem is in the wiring from thermostat to units inside and out. Also if you have changed the thermostat you need to be aware of the setting for the thermostat and the type unit you have. Most thermostats are universal however, you need to make sure that on the thermostat the setting for heat pump on the thermostat it will have a small switch and on switch will have hp at the top and nonhp at the bottom. If you have a heat pump you need to make sure that the setting on the thermostat is on hp if not a heat pump nonhp is the setting. Also there will be a switch that has g at the top and e at the bottom This is you gas or electric heating seletor switch make sure this switch is in the proper position for either gas or electric heat. Good luck on your repairs Hope this helped

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1 Answer

I need a wire diagram of a central heat and air with a heat pump


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O/B (Only needed if system is a heat pump)

May 07, 2009 | Honeywell Heating & Cooling

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