Include the model and serial for accurate results, that being said the standard wiring is RGYW (C)
R= (red) low voltage power from the transformer to "R" on the thermostat
G= (green) to "G" on the thermostat to the fan relay
Y= (yellow) to "Y" on the thermostat to the AC contactor (relay) coil. (usually outside in the AC unit).
W= (white) "W" on the thermostat to the heating terminal/gas valve, controller (varies with manufacture).
C= (common) not used much these days but some thermostats have to be "powered" by the low voltage transformer because they have lights, rechargeable batteries or other functions that require power.
SOURCE: 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
SOURCE: Air handler
This should be doable: First get pen and paper-start at the furnace, theres a group of 5-8 wires leaving the furnace anfd going to the thermostat and a group of 2-3 going to the condenser outside that all need to be identified and the location in the furnace recorded if your furnace has a control board simply right the letter and the corresponding wire color:and whether it belongs to the condenser grp or the T-stat grp.
Furnace
R-red-to t-stat
C-yellow to cond
Y-red to cond and yellow to t-stat
G- green-to t-stat
W- white- to t-stat
If you dont have a circuit board youll be doing the same thing but using the components rather than letters;
Transformer 24v- red to t-stat
transformer 24v com -yellow to cond
Red from cond connected to yellow from t-stat
fan relay - green to t-stat
gas valve - white to t-stat
K then go to you t-stat and simply connect the corasponding component or leter to the thermostat gterminal
Cond Furnace Thermostat
yellow com- blue -C or B
gas valve or w-white -W
fan relay or g -green -G
trans 24v or R -red - R
red connection to cond or Y on board -Y
Hope this helps.
SOURCE: Wiring diagam for goodman heatpump
On your t-stat you have Y, W1, W2, R, O, G, B or C or X. Y is your cooling circuit and will be the same in the air handler and heat pump unit, use the yellow wire for this circuit. W1 and W2 are your back up elec. or gas heat. Depending on how many kws or heat strips you have and t-stat wires you will put the white wire to W1 in both the t-stat and air handler. W2 is for your second stage back up heat if air handler calls for it, this will be a tan or brown or black t-stat wire and goes to W2 on t-stat and air handler. R is half of your 24v control power from the transformer and is the red wire and goes to the t-stat, air handler, and heat pump. O is for the reversing valve in the heat pump that switches it from heating and cooling. You guessed it the orange wire connect to t-stat and heat pump. G is for the blower and is the green wire to the t-stat and air handler. B or C or X is known as the common which is the other half of control circuit from 24v transform it is the blue wire and goes to the t-stat, air handler, and heat pump.
SOURCE: will not go into defrost
Did you change the thermostat in heat pump? or did you change it when you replaced the board?
SOURCE: Goodman Air Handler motor will not turn off.
Look at your Thermostat wiring.
If there is a green wire going to the "G" terminal, disconnect it.
If it stops running, you have a bad T-stat.
If it keeps running, you either have a stuck fan relay or a low voltage control wiring malfunction.
Those are usually related to one of the safety switches having problems.
If green is not going to G, let me know, and we will determine which one is indeed the fan wire and go from there.
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