Replacing thermostat? the thermostat had 3 three wires hook to it . 1 blue...
the thermostat had 3 three wires hook to it . 1 blue rope to 1 terminal and the red and black wire to equal terminal. it's an old honeywell and i can't read the mark anymore. how do i hook to a new programmable thermostat?
Answers: You will stipulation to open the cover on the furnace to see how it be connected there. If it's a fry only, in attendance will only be 2 wires. If near is a dedicated hanger-on on control, there will be 3. Look at how they connected the thermostat wires to the furnace and copy them to the exotic thermostat.
Connect the red wire to Rh and the blue chain to W.
If there is a faithful fan control hook that telecommunication to G.
try the codes for your type of furnace , sounds like an grease furnace