Question about Honeywell Heating & Cooling

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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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How can I connect an Intertherm furnace with a heat pump to a new Honeywell thermostat?


Ensure that that thermostat is for a heat pump and has connections for the emergency heat strips.

Feb 02, 2016 | Heating & Cooling

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 Heating & Cooling

1 Answer

Installed the Honeywell RTH2300/RTH221 but the old thermostat was removed by someone else. Since the original wires were not labeled, I simply attached them to the new thermostat by following the letters...


This appears to be a thermostat installation that was made without regard to wire code. The Honeywell material I have suggests it may be necessary to check connections at the furnace end and work back to the thermostat. There may be compatibility problems between the number of wires in the old installation and terminal connections in the new thermostat. Honeywell may be able to help at 1-800-468-1502.

Oct 29, 2013 | Heating & Cooling

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 | Heating & Cooling

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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 | Heating & Cooling

1 Answer

My 6yr furnace is acting weird. temp is set for 71 degrees, but house is at 53. Furnace will run for while, then wont. this morning i turned it ''on'' versus ''auto'', it kicked on..help


To quickly eliminate the thermostat, shut power off to
furnace open bottom compartment door where the
blower motor is. The control board should be located
in fron of it.

Find the Thermostat wires terminal connections.
R/G/W/Y are most common. R/G/W1/W2/Y1/Y2/ is
another example.

Write down colors of wires where they went to those
letters and then remove them.

Make a jumper wire and put between R and W1(W).
put bottom door back on and turn power on. The
heat should come on along with the blower.

Turn furnace off, put thermostat wires back to terminals.Turn power back off, take the information
that you wrote down and go to thermostat. Remove
the thermostat cover to get a view of the thermostat
wires.

Make Sure the same wires are going to same to
the same letters at both locations. If they are then
it appears you have a bad thermostat.

Jan 17, 2010 | Heating & Cooling

1 Answer

3 Month baby and need help hooking up thermostat ASAP


The wire colours mean nothing. If your old one didn't have letters or you already disconnected it, you will have to go to the furnace. Under one of the panels there will be a control board to which the thermostat wires connect and this might have the letters printed on it. Trace them back and connect them appropriately.

If you have a furnace that is like mine (a single-stage natural gas one), chances are that R is +24V, C is common, W is heat call, and G is the blower. Y is generally cooling. The furnace could be turned on by connecting R, W, and G together, I suppose, if the above doesn't work... but it won't shut off automatically.

Jan 25, 2009 | Hunter Fan Company 5/1/1 Programmable...

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 Heating & Cooling

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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

1 Answer

Wiring a Honeywell Deluxe Programmable Thermonstat


did you mark which terminals you removed the wires from on the old stat? If not you will need to look on the furnace and see what letters they are connected to .. then connect to the same on the thermostat.

Feb 11, 2008 | Honeywell Programmable Thermostat Heater

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