I disabled early on for the summer and recently enabled it for the
cooler weather. I have the heating schedule set for 72 at 8 AM. The Nest
is not preheating, and the heat is going on at 8 AM.
1. I live in North America.2. I believe it's a Nest Learning T-Stat 3rd
Gen.3. No preheating message on display.4. It first occurred this fall
when I switched over from the A/C to heat. I had disabled the
pre-cooling for the summer and reenabled the ...