how do i get it to stop changing the temperature on its own? i don't want any smart schedules or eco modes

Diagnosis

The Amazon Smart Thermostat is designed as an "AI-first" device, meaning it doesn't just follow a static schedule; it utilizes cloud-based logic to preemptively adjust temperatures. When your thermostat changes the temperature on its own despite no manual schedule being set, it is typically caused by "Alexa Hunches." This feature uses machine learning to analyze your habits and the local weather to "guess" when you want the house warmer or cooler, overriding your current setpoint without a notification. Additionally, the device often integrates with "Energy Savings" profiles or "Eco" modes that are triggered by grid demand or specific temperature thresholds. Because these controls live in the Alexa cloud rather than the local hardware of the thermostat, simply resetting the device or clearing the local schedule will not stop the behavior. You can confirm this is happening if the Alexa app shows a status like "Set by Alexa" or "Adjusted by Hunches" in the device activity log.

How to Fix It

To completely strip away the automation and return the device to a manual-only operation, you must disable settings in both the Alexa app and the device interface. Follow these exact steps:

1. Open the Alexa App on your mobile device.
2. Navigate to the Devices tab at the bottom and select Thermostats.
3. Select your specific Amazon Smart Thermostat from the list.
4. Tap the Settings (gear icon) in the top right corner.
5. Scroll down to the Hunches section. Toggle the switch for "Enable Hunches" to OFF. This prevents Alexa from making "smart" guesses about your temperature preferences.
6. Return to the main device settings menu and locate Energy Dashboard or Eco Mode. Disable any "Automatic Energy Savings" or "Eco" triggers that allow the device to drift from your set point to save power.
7. Physically go to the thermostat on your wall. Press the screen to wake it, then tap the Menu icon.
8. Navigate to Settings > Preferences > Schedules.
9. Ensure the schedule is set to Off. If there are any pre-existing time blocks, delete them individually to ensure no legacy programming remains.

If That Didn't Work

If the temperature continues to shift, the cause is likely a hidden automation or a third-party integration:

• Audit Alexa Routines: Go to More > Routines in the Alexa app. Scroll through every single active routine. Look for any that use "Device Settings" or "Smart Home" as an action. Even a routine named "Good Night" or "Leaving Home" may have a hidden command to set the thermostat to 62°F or 78°F. Delete or disable any routine that references the thermostat.
• Check Guard Mode: If you have Alexa Guard enabled, the system may adjust temperatures based on "Away" status. Go to Devices > Guard and ensure it is not triggering a temperature change when the house is set to "Away."
• Remove Third-Party Skills: If you have linked the thermostat to a third-party energy provider (like an electric company's "Demand Response" program), they can override your settings during peak hours. Go to More > Skills & Games and disable any energy-management skills.
• Hard Reset: If the software is glitching, perform a factory reset. On the device, go to Settings > Device Reset. Note that you will have to re-add the device to your Wi-Fi and Alexa account.

Heads Up

• Cloud vs. Local: Remember that the Amazon Smart Thermostat is a cloud-dependent device. Changes made on the wall unit do not always override commands sent from the Alexa servers. Always check the app first.
• C-Wire Stability: If the thermostat is rebooting and losing settings, ensure you have a dedicated C-wire (Common wire) providing 24V power. Power cycling can sometimes cause the device to revert to default "Smart" settings.
• Firmware Updates: Amazon pushes updates silently. If you notice the "Hunches" toggle turn itself back on, check for a system update or re-toggle the setting after a power outage.