Aux wire?

[JRock]

I have an extra wire that I’m worried about where it will go when I install. I think it’s an AUX wire but it was previously labeled “E”? Current thermostat doesn’t use the wire labeled “C” but it’s there and taped. I’m going to post a pic 

[JRock]

 

[Patrick_Caezza]

It looks like you have just a conventional system.

You can verify the wiring by comparing the thermostat to the terminal block on the control board in the furnace/air handler.

I see a C label. Is that on the brown wire?

I guess that the wire labels are from a previous thermostat that this one replaced. SO I would suggest verifying the wiring before proceeding.

[JRock]

Yes, the C label is on the brown wire. I was wondering about that, because from what I’ve read it usually isn’t brown. But kinda assumed it was actually the C wire considering my current thermostat doesn’t use a C wire apparently. 

[Patrick_Caezza]

Never trust the wire color as there is no standard.

[MelbaDT]

Hey folks, 

Thanks for your expert advice here, Patrick_Caezza. 

JRock, I want to ensure everything is covered here. Let us know if you have more questions. 

Best, 

Melba

[JRock]

I don’t live at the residence with the thermostat I’m replacing so I have t been able to check the terminal yet 😬 sorry for the delay AND thank you for the help!!

[MelbaDT]

Hey there, 

Got it and thanks for letting me know — there's also nothing to feel sorry about. Feel free to reply back as soon as you're able to, we'll always be here. 

Best, 

Melba

[MelbaDT]

Hey there, 

It's me again — how's it going now with your thermostat? Have you had the chance to get to the device's location?

Best, 

Melba

[MelbaDT]

Hi, 

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba