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Trying to hook up Honeywell RTH6350 thermostat. When turned on cool out air blows out. We only have a green, red, yellow and white wire from the old unit. Are we missing some wires? we have a heat pump.

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  • kruegerachas Apr 02, 2011

    Thank you Justin. Our t-stat is programable and battery operated. The red wire is connected to the R terminal with a jumper between R and RC. The system goes on but blows hot air when on cool. When wiring we just have the thermostat on off. Are we supposed to turn something off at the circuit breaker box also?

  • w_petersonjr
    w_petersonjr Jul 17, 2013

    I Cant get my compressor to come on i have white goin to w yellow goin to y green goin to g nothing goin to o red goin to r again red goin to r nothing goin to b nothing goin to common what do i do

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Your Thermostat should wire as Red to Rc/Rh (if Rc/Rh are not connected you need to put a jumper between them; White to W; Green to G; and Yellow to Y on your thermostat. These will be the only wire connections that you need to connect from the unit to the thermostat. However, if your thermostat is not battery operated and is programmable then you will have to run on wire form the transformer in the units C to the Bl on your thermostat.

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Justin

Posted on Apr 02, 2011

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  • Justin Burnett
    Justin Burnett Apr 02, 2011

    No you do not have to but it is a good idea so that you do not burn up the heat anticipator. Is your outside unit a condensor or a heat pump? If it is a condensor then you only need the four wires. Make sure that your outside unit is powered while the thermostat is in the cooling operation. If not post back and I will tell you how to check it. W is heat, G is fan, R is tranformers 24 volts, and yellow is colling.

    Justin

  • kruegerachas Apr 02, 2011

    We have a Trane XE1000 Heat Pump

  • Justin Burnett
    Justin Burnett Apr 02, 2011

    I relook at the post and notice now that you have a heat pump yes you need a fifth wire. You will need to energize the revirsing valve. You will need to run a new five wire wire to your thermostat. Everything else still connects the same except except W will go to AUX and O from your unit will hook up to O. I also need to know if your heater is gas or electric so that we can program your thermostat accordingly.

  • kruegerachas Apr 02, 2011

    It is electric...how difficult is it to wire a new 5 wire? Do we need to call an electrician? We have no clue.

  • Justin Burnett
    Justin Burnett Apr 02, 2011

    Now it is not difficult at all and it is low voltage not risk of shock. You will need to turn off the power to the unit. Open the service door and locate the low voltage wires see what connections you have. Run the new thermostat wires from the unit to the thermostat. Install as before except your white go to W1 and heatpump (O) will go to W2 at on thermostat. Then you will have to program the thermostat for a heat pump refer to your owners manual for the set up of the functions on page 13, Note the heat pump reversing valve on a trane is energized during cooling.

  • Justin Burnett
    Justin Burnett Apr 02, 2011

    Now it is not difficult at all and it is low voltage not risk of shock. You will need to turn off the power to the unit. Open the service door and locate the low voltage wires see what connections you have. Run the new thermostat wires from the unit to the thermostat. Install as before except your white go to W1 and heatpump (O) will go to W2 at on thermostat. Then you will have to program the thermostat for a heat pump refer to your owners manual for the set up of the functions on page 13, Note the heat pump reversing valve on a trane is energized during cooling. If you need a copy of the manual i can give you a url to it.

  • Justin Burnett
    Justin Burnett Apr 03, 2011

    No, but if you think you not going to be able to do it. Call a Heat and Air service company and tell them you have a Honeywell thermo stat you need hoocked up to a air handler and heat pump. The service charge should not be over a $100. Shop around for the beat price. Electrician is of no use they do not install HVAC and most do not know how to wire the low voltage.

    Justin

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You will need 5 wires from the air handler to the new Thermostat to work properly IF YOU don't have electric heat back up then 4 wires will work R Y O G C to C=common;W to AUX=electric heat ;G to G = fan; O to O/B =reversing valve;Y to Y = Air conditioning; R to R leave in metal clip in R/Rc =power; Use a jumper wire and connect E & AUX on the thermostat......
Heat Pump you will need R;Y:O;C R=power, Y=Air Conditioning; O= reversing valve; C=common If the Heat Pump has a W terminal that is used to turn on the electric heat when the Heat Pump goes into a defrost cycle..... Here is a manual for the RTH6350 http://customer.honeywell.com/techlit/pdf/PackedLit/69-2416ES.pdf

Posted on Apr 02, 2011

  • Justin Burnett
    Justin Burnett Apr 02, 2011

    You only need C if the thermostat is not battery operated. O if it is a heat pump his unit operated before on 4 wires it will operate now with four wires as long as the thermostat is battery operated.

  • kruegerachas Apr 03, 2011

    Thank you for all your time and help. Found a 5th wire - blue - had friend come over and he fixed it for us. Thank you again

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