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Daniel Griscom
Daniel Griscom
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Upgrading to a wifi thermostat and already have extra unused wire from furnace to wall, just not sure where to connect it at the furnace. Do

enter image description here

I do have central air installed, and assume theenter image description here blue wire just needs to be added to any existing junction, just not sure which one.

Upgrading to a wifi thermostat and already have extra unused wire from furnace to wall, just not sure where to connect it at the furnace. Do have central air installed and assume theenter image description here blue wire just needs to be added to any existing junction, just not sure which one.

Upgrading to a wifi thermostat and already have extra unused wire from furnace to wall, just not sure where to connect it at the furnace.

enter image description here

I do have central air installed, and assume the blue wire just needs to be added to any existing junction, just not sure which one.

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Kenneth Axtell
Kenneth Axtell
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Where to connect C wire on older furnace

Upgrading to a wifi thermostat and already have extra unused wire from furnace to wall, just not sure where to connect it at the furnace. Do have central air installed and assume theenter image description here blue wire just needs to be added to any existing junction, just not sure which one.