My 1st gen had a schedule that I changed in the nest app. Each day can
be scheduled or just hold the day and copy and paste it to the others.
At the bottom I hit “copy week” and it fixed my issue. Hope it helps.
I saw a diagram in the nest app under “Thermostat” scroll down to
“equipment” and at the top was “wiring” that showed the 6 connectors and
labeled them (cool) (power) (heat) etc. i hope it’ll help.