Question about Goodman GMS90703BXA Heater

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Wiring I disconnect the wiring for the thermostat did not label wiring could you tell me what the wiring is coming from the unit to the thermostat I have red white blue green and were should they go on the new thermostat honey well.

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Re: Wiring

Web is right however normally red is power in goes to r on t-stat white is heat goes to w1 on t-stat blue is common and goes to c on t-stat green if for the blower fan and goes to g on t-stat

Posted on Dec 19, 2007

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Re: Wiring

On the Goodman control panel each wire is marked (on the PCB board) Y, R, B, W, Br etc. These should also be letters next to the screws for the wires on the thermostat. match the letters/colors to both sides.

Posted on Nov 10, 2007

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I purchased a Honeywell RTH2310 Thermostat earlier this year during the summer. It has worked fine up until now. Since it's starting to get cold we've started using the heater, now all of a sudden the...

I am only guessing here but I believe that the thermostat may need to be gone over as far as the wiring from the thermostat to your heater. A thermostat is basically a switch that operates by way of a thermometer. On the wiring it has red and white wires these control the heat section of your furnace/ heater. They also go down the wall to the heater where it should have terminals to a transformer to convert control voltage to 24 volts, red takes 24 volts to the thermostat and white returns back down to a 24 volt relay to turn on the heater. if at any point the red and whit touch any where the thermostat does nothing at all. That means there may be a short some where in the red and white wires. To check this use a volt ohm meter, disconnect the red and white wire from the thermostat and test with one lead on each wire, a dead short reads 0. There may be slight readings thru the relay, so to check only the wires power down the heater disconnect the red and white wires at the heater and again read only the red and white wires with out being attached to anything it should read open. If not replace thermostat wiring. Inspect the wires for cuts where they come thru the wall and go thru the furnace. Most common places where the wire gets cut or pinched is where it is feeding thru the heater case.If all rings out fine it could be a faulty thermostat. This is a lot of instruction but you are looking for a short and this is the easiest way to go about it.

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Need wiring diagram for Honeywell RCT8100

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The wiring your describing on the old thermostat is telling me you have a heat pump with second stage heat and the new thermostat is for air conditioning only. You will need to get a thermostat for a heat pump.

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Hi Proper way on wiring furnace.

I can give you a start, For heat only, R terminal on furnace to Red wire to R or RH terminal on thermostat. W terminal to White wire to W terminal on thermostat. G terminal to Green wire to G terminal on thermostat. This will get you heat but not air conditioning.

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1 Answer

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What was the old thermostat labels and the wire colors that went to them?
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Thermostat wiring diagram for heat and cool unit

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