Please help find common wire on my furnace to power thermostat
#1
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Please help find common wire on my furnace to power thermostat
Hi,
I got a new ecobee3 thermostat that requires a common C wire. In my thermostat wiring, I have an extra blue wire unused. I plan on using this blue wire to connect to the common wire in the furnace.
Could anyone help me? I thought in the picture of the blower diagram, is the "Wh common" is the wire to connect to? Any help is appreciated.!!
Thanks
Full image file of furnace: rheem furnace - Album on Imgur
I got a new ecobee3 thermostat that requires a common C wire. In my thermostat wiring, I have an extra blue wire unused. I plan on using this blue wire to connect to the common wire in the furnace.
Could anyone help me? I thought in the picture of the blower diagram, is the "Wh common" is the wire to connect to? Any help is appreciated.!!
Thanks
Full image file of furnace: rheem furnace - Album on Imgur
#2
In my opinion, you need a multimeter and someone with the skill to use it to decide how to wire up your thermostat.
Just going on the color of the wire is an invitation to a problem. You need to check and be sure.
Just going on the color of the wire is an invitation to a problem. You need to check and be sure.
#3
Welcome to the forums.
Don't connect to anything yet. That COM you are talking about is the 120v neutral. You don't want to connect there.
This is what we are interested in. What are the four colored wires on that transformer.
White, black, ???, ???.
There is usually a wiring diagram on the back of the blower door.
That transformer is not the original..... it's been added. The one on the fan center may have burned open.
Don't connect to anything yet. That COM you are talking about is the 120v neutral. You don't want to connect there.
This is what we are interested in. What are the four colored wires on that transformer.
White, black, ???, ???.
There is usually a wiring diagram on the back of the blower door.
That transformer is not the original..... it's been added. The one on the fan center may have burned open.