Old thermostate cables

[Rod5]

There is a cable labeled K in the old installation. Does anyone know what it would be for?

[aatienza]

Hey Rod5,

Thanks for reaching out! Let's check — what's the make and model of your HVAC system? Could you send us a photo of your wiring connection so we can take a closer look? Also, what country are you located in?

Thanks,

Archie

[aatienza]

Hey there,

I just wanted to follow up to see if you still need our help. Please let us know as we would be happy to answer any questions you may have. 
 

Thanks,

Archie

[aatienza]

Hello there,

Just checking in to make sure that you've seen our responses. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.
 

Thanks,
Archie