Problem swapping out a Honeywell th8321wf1001 thermostat

[RDosch]

Hi,just received my Nest learning thermostat, I hope someone may be able to help. My current thermostat has an orange wire going to terminal U.2. There is also a jumper from U1 to R0. I cannot find our what these U terminals are and the corresponding connection to the Nest. I have attached a phot of the Honeywell wiring

thank you

[EdwardT]

Hi RDosch,

Thanks for reaching out. Upon checking, the U terminals for your current thermostat are for the humidifier. Google Nest Learning Thermostats are compatible with most whole-home humidifiers and dehumidifiers that work independently from your air conditioner. However, professional installation is strongly recommended. You can check this link to learn more about our Nest Pro services.

Thanks,

Edward

[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.

I appreciate the help, Edward.

Thanks,

Archie

[aatienza]

Hi 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