My existing thermostat had red to D, white to C, yellow to B and green to A. The nest has totally different letters for each connection but some online tutorials said to connect red to R, white to W, green to G and red to R, so that’s what I did. It comes up saying to complete setup in app but I can’t get it to set up. Are these wiring connections correct?
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Thanks for reaching out.
Based on the description of your current thermostat, you have a proprietary system. This isn't compatible with Google Nest thermostats. However, some proprietary systems can be rewired by a pro installer to be compatible.
You may check this out for more information: https://goo.gle/3Q3jQs8
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