How install new smart thermostat
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How install new smart thermostat
I am trying to replace a older programmable Honeywell thermostat with a EcoBee smart thermostat but am unsure of the wiring. The Honeywell has only the Red, White, Yellow & Green wires connected...there is also a Blue wire coming out of the wall that had electrical tape on it & not used. Is that Blue wire possibly the Common wire need for the new thermostat as “C”?
#4
Welcome to the forums.
Remove the blower door to locate the control board.
There should be a terminal strip with a C terminal.
If not....post a picture of the board or the part number on it......How-to-insert-pictures.
Remove the blower door to locate the control board.
There should be a terminal strip with a C terminal.
If not....post a picture of the board or the part number on it......How-to-insert-pictures.
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Ok I will have to get some help with locating furnace/AC blower door. Not sure on what that looks like.
What would happen if I just hook up the Blue wire as the Common? Would the thermostat work? Or should I just call for help with blower door in attic?
#6
Do you know what your system is ?
Your thermostat needs to be programmed.
Your wiring would suggest a gas furnace with a split A/C system.
What wire colors are on what terminals ?
If it's a furnace..... the door is easily removable.
You could try to connect the blue to C and see if it works.
I would doubt it.
Your thermostat needs to be programmed.
Your wiring would suggest a gas furnace with a split A/C system.
What wire colors are on what terminals ?
If it's a furnace..... the door is easily removable.
You could try to connect the blue to C and see if it works.
I would doubt it.