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Wiring convserion for honeywell rth3100c thermostat. have a rc wire from old thermostat

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  • Anonymous Apr 21, 2009

    wiring conversion not matching up help?

  • Anonymous Apr 26, 2009

    i need a wiring diagram

  • Anonymous Apr 28, 2009

    air want kick on



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6 Suggested Answers

  • 24 Answers

SOURCE: Need help with wiring thermostat

first do you have a heat pump unit or standard a/c? standard a/c connections at the thermostat go like this red wire to rh-rc which is the 24v power and you don't have to remove the jumper.white goes to w which is the heating wire yellow goes to y which is the cooling wire green goes to g which is the fan wire and blue goes to c which is the common wire. so if your stat has rc- rh ywgc you should be set if the wires on the furnace correspond with the same alpha designation.orange may be used if u have a heat pump unit otherwise it may just be a spare you cap off and leave behind the subplate.

Posted on May 31, 2009

  • 49 Answers

SOURCE: Intertherm to Honeywell thermostat

Typically if you have a yellow wire in the "y" terminal blue is used as common or "c". As far as your jumper from rc to rh, that will depend upon what type of heat you have. If all of your heat and cooling come from your packaged unit outside, yes you will need the jumper. If this does not work maybe you have a bad breaker or transfomer.

Posted on Oct 14, 2007

  • 49 Answers

SOURCE: Replaced thermostat on FA4ANF030 with Honeywell model rth3100c does not work

If you have a heat pump do not put your blue wire on b. Put it on x or c. If you don't have an inline fuse you may have blown your transformer.

Posted on Dec 04, 2007

  • 230 Answers

SOURCE: im changing an old honeywell

Yes, I believe that you will be fine. If the original wiring is correct then I have listed the basic wiring below. As always read the directions and make sure the wiring matches your system.

Red wire = Rh (24v power, should have an exsisting jumper to RC)
White wire = W (heat mode)
Yellow (or sometimes blue) wire = Y (A/C)
Green wire = G (Indoor Fan)

Posted on Jul 03, 2008

koolbreezes
  • 540 Answers

SOURCE: got a honeywell t8400c thermostat

R--- rc or rh y--yellow g---green w--white red is power yellow is cool g--fan white is heat

Posted on Sep 03, 2008

pierre1811
  • 144 Answers

SOURCE: replacing thermostat: tstatccshp01 with th8320u1008

Hook up o to o/b, then in the installation programming set the change over valve to energize in cool. Then hook up w to aux. Good luck.

Posted on Jan 21, 2009

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1 Answer

How do you relpace an A.C. thermostat?


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If there is Rh and Rc or R and Rh, these terminals should be jumpered together.

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I will assume you did not write down what color wire you took of each letter on old thermostat? Sometimes color of wire doesn't matter as some installers will use whatever color. If you noted where each wire was on old thermostat, just put same color wire to same letter on new one. Under normal situation. y is for compressor (cool) G, is for fan (on AC) , RC is 24 volts from transformer for AC side, RH is 24 volt transformer from heat/furnace, and W is for other wire from furnace, is furnace is only 2 wire system. Was there any wire connected to A on old thermostat?

Apr 11, 2012 | Air Conditioners

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My old thermostat is a goodman and the wires are Y G R O W2 E C the new thermostat we bought is a honeywell RTH3100C and the wires are E Aux Y G O L R B C have a connection for all except the L B...


OK... You only need to use the wires that were already connected on the old thermostat.. the new thermostat will have extra terminals left over... The L and the B are for systems that require those or carry an auxillary device like himidity control etc.. Let me know how it works

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Go to honeywell.com
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Bottom red highlighted box literature/image search
Type in thermostat model number
Click on arrow to right
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Im changing an old honeywell thermostat with a new honeywell thermostat. the old on has wires 4 wires connected to 4 screws C,R,G,W but the new thermostat has a place where the wires go which are...


Yes, I believe that you will be fine. If the original wiring is correct then I have listed the basic wiring below. As always read the directions and make sure the wiring matches your system.

Red wire = Rh (24v power, should have an exsisting jumper to RC)
White wire = W (heat mode)
Yellow (or sometimes blue) wire = Y (A/C)
Green wire = G (Indoor Fan)

Jul 03, 2008 | Honeywell Air Conditioners

4 Answers

Replaced thermostat on FA4ANF030 with Honeywell model rth3100c does not work


if you have a newer t-stat your heat pump reversing valve is either o or b depending on the type of system you have

Dec 02, 2007 | Air Conditioners

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