[beaversfg2]

I have an old thermostat model t852a from honeywell it has four wires can someone help identify these wires to use on my new thermostat

[T-Top]

Give us the color of wires that hook to what letter on the thermostat. We will see if we can walk you through it.

[mgliue]

Yellow to Y, green to G, white to W and red to R. Easy pal

[wmproop]

(quote) yellow to Y, green to G, white to W and red to R. Easy pal


This is correct if, whoever wired it did it correct according to rule of thumb,, but not always the case
Give the answer t-top asked for,, or go to the furnace and write down what each color of wire is connected to what

[beaversfg2]

I have a blue wire, orange wire, blue and white wire, and a orange and whit wire. None of the wires are labeled and nor does the thermostat have any labeling to where the wires connect.

[mgliue]

Open de furnace door, take a look to the connections to the electronic board. I suppose that your new th, is labeled. So if example if your orange in the board is connected to W is going to be connected to W in the th. And the same for the others. Good luck!!

[mgliue]

Very important: Shut off the main switch of your furnace before opening your door.!