Google Nest Thermostat and AL1/X1 Wire

[BrentHamm]

Looking for help hooking up my new nest smart thermostat.  

Most of the wires make sense, but there is one that goes from AL1 on the furnace to X1 in the old thermostat.  Not sure what to do with this one.  

I did search but did not find a good answer.

This is what i have:

Furnace	Color		Thermostat	Color
Y	Red		Y1	Red
W	Blue		W2	Blue
O	Green		O/B	Green
G	Green		G	Green
R	Red		R	Red
C	White		C	White
AL1	White		X1	White
AL2	Not Used
A	Not Used

[BrentHamm]

[moralesvicente]

Hi BrentHamm, 

Thank you for taking an interest in our community. I understand you have some questions about connecting your wiring system to a new thermostat. No worries, it’s a pleasure to assist you. 

Regarding the wiring configuration, most of the wires are compatible with our thermostats; however, for the most accurate information and to ensure your safety and the proper functioning of your equipment, I recommend consulting a qualified technician. They can provide professional assistance tailored to your specific situation. For additional information, review this helpful article: Identify a thermostat wire. 

If you have more questions, please feel free to write in this forum. 

Best regards, 

Daniel 

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