Hi,

I want to connect a Honeywell CT51A t-stat and I don't know what colored wires go with what terminals. I do not have air conditioning.

The cable from the furnace has 5 wires

On the furnace, the wires are connected as follows:
White - T
Red - 3T
Black - R
Blue - G
Orange - Y

On my t-stat I have the following terminals:

R
1
2
G
Y
W

Help!

Do you have a heatpump?, is the new tstat heatpump compatible?, should say on the package,, some say 2 heat / 1 ac,, some say heat/cooling tstat,, some say heat only,, some say cooling only

Honeywell #CT51A-1035 24V Heat/CoolThermostat====== if this is what you have and you have a heatpump, it won`t work

Hi,

No I don't have a heat pump. I have oil forced air furnace.

Quote:

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Originally Posted by eddie6505

On the furnace, the wires are connected as follows:
white - T
Red - 3T
Black - R
Blue - G
Orange - Y

---

Are there any other wires connected to any of these terminals?

Quote:

---

Originally Posted by eddie6505

On my t-stat I have the following terminals:

R
1
2
G
Y
W

Help!!

---

Are you referring to the old, or new t-stat? If new, what colors/letters were connected on the old one?

No Nothing.

I purchased the Honeywell thermostat new. My wife took off the old thermostat but didn't write down what colors were with what terminals on the old thermostat.

Quote:

---

Originally Posted by eddie6505

My wife took off the old thermostat but didn't write down what colors were with what terminals on the old thermostat.

---

Save that one for the next time she calls you "stupid"... ;) Stay tuned...

I just checked Honeywell.com, CT51A does not match any documents/search criteria. Are you sure this is an accurate/complete model # ?

It's on the Honeywell web site under do-it-yourself, non-programable, non-digital, standard thermostats.

Below is a link for Ace Hardware showing the exact thermostat.

HONEYWELL CT51A1035 THERMOSTAT STD FOR HEAT/COOL APPLICATIONS CT51

Just cut and paste into your browser.

That's a nice pic, but no useful info is available there. I would need to view the wiring diagram for the t-stat to determine the function of each terminal. It should be with the installation instructions. If you could scan & post image, we may get somewhere.

Here is a link for a .pdf file off the Honeywell website showing the back of the thermostat.


http://customer.honeywell.com/techli...s/69-0265b.pdf