Hi Jgibbs,
Thank you for posting in the community. I'm sorry to hear that your heat is turning on an hour before its scheduled time, even though you have Early-On and Auto-Schedule turned off, and the preheating function is also disabled. Let's try to dig a bit deeper into what might be causing this.
Before I begin, I need to ask a few questions for further assistance:
Does the heat consistently turn on exactly one hour before the scheduled start time, or is the timing sometimes different?
Have you noticed if this early activation happens every day, or is it intermittent?
Have you ever experimented with any custom routines in the Google Home app that involve your thermostat, even if they are not currently active?
Can you confirm what exact model of thermostat you are using?
Can you confirm that you have also checked within your thermostat settings to see if there are any saved settings that are causing this situation?
I would recommend that you restart your device to clear any schedules or automations that have been saved previously. Please visit the following page to learn how to restart or reset a Nest thermostat.
Please keep me posted. I'll look forward to your response.
Best regards,
Kevin
