Question about Honeywell Air Conditioners

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Which wires are connected to the thermostat by the letters G W R Y ect? I have sn A/C and Furnace.

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Thank you I figured it out. The problem was that I only have three wires and need four wires to have the fan run on ON independently of the Air or Heat. Thank you!

Posted on Jun 24, 2008

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Have a Carrier Electric Furnace & AC, Model #FA4CNF048 and need to know how to connect a Blue wire to power to supply C wire for new Honeywell Wi-Fi thermostat. Any Suggestions?


C is common for 24 volts from the a/c transformer secondary or low side. R and C are 24 volts and will power up loads of 24 volts such as thermostats requiring to be powered up,
C is usually grounded or connected to the metal of the a-c unit. Use any color available to connect the wi-fi thermostat C to the a-c C to deliver 24 volts to the thermostat.

Jul 06, 2015 | Carrier Air Conditioners

1 Answer

Can I install this thermostat to a Geo Thermo Premier 2 Water Furnace with the following wires connected as follows from old Honeywell thermostat TA511M1010? Old connection; R, C, Y1, W, Y2, L, O, G


Yep, you should be able to run your water furnace with the thermostat. Just wire it up same letter to same letter on both devices. If your thermostat worked before, it should work again. I couldn't find the honeywell part you listed, but the terminal designations tell enough on their own. Don't forget to shut off all power sources before doing any wiring, and to configure the control board on the water furnace before switching the thermostat to any active mode.

In case you don't have it, here's the install guide3 for the water furnace.
http://www.waterfurnace.com/literature/premier/IM1555.PDF

Please mark me helpful and feel free to ask more questions in this same thread if you need to.

Jan 03, 2015 | Honeywell Air Conditioners

1 Answer

Havc thermostats


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

1 Answer

I have 4 wires at thermostat, g, b, w, y. The old thermostat was removed before I owned the house. I would like a wiring diagram so I can trace the wires an know how to hook up. Thx. Ken


Trace the thermostat wires into your furnace and write down which color wire ties on to which letter at the furnace terminal strip. The HVAC color code is - g (Green) = house fan b (Blue) = auxiliary w (White) = heat y (Yellow) = cooling. If you need anything, let me know. And please vote on this response. Thank you.
Roger

Apr 03, 2011 | Air Conditioners

1 Answer

How do i install my honeywell thermostat. the connection letters are not the same as my old thermostat


See if you can get in furnace where stat wires are connected. R terminal is 24 Boyle to stat. W is for heating. G is for blower. Y is for air conditioning. C is for common but you usually don't need this. Match these letters with stat. If stat has Rh and Rc connect these If you have furnace and air conditioner

Jan 16, 2011 | Air Conditioners

1 Answer

How do i wire the thermostat to the magic chef furnace


Inside the furnace there is either a transformer relay with the markings of R & W stamped near the terminals or T TH or a circuit board with terminals marked R and W. This is where your thermostat wires will connect to. At the thermostat, connect the R terminal to the wire connected to the R terminal at the furnace or T terminal at furnace. The other wire goes to the W terminal on the thermostat. This will give you heat

Jan 16, 2011 | Air Conditioners

2 Answers

I have a DuoTherm BriskAIr 13.5K BTU. The Dometic thermostat also controls my HydroFlame 8531-IV furnace. This morning, the furnace would not come on. I checked the wiring and there is no voltage at the...


If you look at control box at roof unit, they usually use a separate set of wires for furnace. See what colors they are attached to at harness to thermostat. Some just follow other harness, and come out at thermostat. (bypass control box) Once you've determined which 2 they are, join them together & see if furnace starts, as it should. If it does, thermostat is faulty. If not, pull outside cover off & check voltages at furnace. I'm guessing by furnace model that your unit is approx 30 ft , but if it's a park model, you may have 24 volt system on furnace or 12 volt. Another way of confirming is to go to back of furnace where air intake grille is inside your unit, and locate 2 blue wires going to furnace & remove whatever wires are attached to them & connect them together. Furnace should start up.

Jul 08, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

I have amanual honey well and I want to change it to a programable honeywell but the two wires on the manual thermostat are not labeled, so I don't know where to connect the wires to in the new thermostat


Wires for thermostat control circuits are normally color coded. Check for proper connections at the furnace and connect the same colored wires that you find at the furnace to the like lettered terminals on the new thermostat. R to R, W to W , Y to Y , ans G to G. R is for power to the thermostat, W is for heating, Y is for cooling and G is for furnace fan operation.

Nov 14, 2008 | Honeywell Air Conditioners

1 Answer

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.

Jun 12, 2008 | Quasar HQ2052UH Air Conditioner

5 Answers

Carrier Infinity Control Thermostat SYSTXCCUID01-B


Your old stat is wired for a traditional thermostat and not a communication stat like the new infinity you have. There is a module plug on the furnace board that will need to be connected to the new thermostat for it to work. The wires that are wired now are from a terminal strip inside the furnace. Please contact your local Carrier dealer. They may be able to get that harness for you

Dec 06, 2007 | Air Conditioners

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