schedule keeps changing by itself or ignoring the program i set, even though i turned off smart features.

Diagnosis

The Honeywell Home RTH9585WF is designed with a "cloud-first" logic, meaning the device frequently prioritizes instructions from the Honeywell Home (Resideo) servers over the physical settings programmed into the wall unit. When your schedule is ignored or shifts unexpectedly, it is typically because a "Smart" feature—specifically Adaptive Intelligent Recovery or Geofencing—is overriding the setpoints to ensure the home reaches a target temperature by a specific time, rather than starting the heating/cooling process at the exact time you programmed. This conflict often manifests as the thermostat starting the HVAC system 30 to 60 minutes earlier than scheduled, or skipping a period entirely because the server believes you are away from home. You can confirm this is happening if you notice the "Following Schedule" text on the home screen disappears and is replaced by "Hold" or "Away" without your manual intervention, or if the temperature target shifts slightly despite the schedule remaining visually correct in the menu.

How to Fix It

To fully decouple the thermostat from cloud-based overrides and force it to adhere strictly to your local programming, follow these precise steps:

1. Disable Adaptive Recovery: Press the Menu button on the thermostat face. Navigate to Preferences. Scroll through the options until you find Adaptive Intelligent Recovery (sometimes listed as Optimized Start/Stop). Set this to OFF. This prevents the unit from "calculating" an early start time based on outdoor weather.
2. Force Local Schedule Priority: From the Menu, go to Schedule. Ensure that the setting for Use Thermostat Schedule is selected rather than "App Schedule." This tells the hardware to ignore conflicting cloud commands.
3. Purge App Geofencing: Open the Honeywell Home app on your smartphone. Select your RTH9585WF device. Tap the Settings (gear icon) in the top right corner. Locate the Geofencing menu and toggle the switch to OFF. If this is on, the app will trigger an "Away" mode the moment your phone leaves the designated radius, ignoring your programmed schedule.
4. Clear Current Overrides: On the physical thermostat, press the Run Schedule or Cancel Hold button. This clears any lingering "Permanent Hold" or "Temporary Hold" commands that may have been pushed from the server and are blocking the program from executing.

If That Didn't Work

• Perform a Hard Network Reset: If the device continues to sync ghost schedules, the local cache may be corrupted. Go to Menu > Wi-Fi and select Forget Network. Power cycle the thermostat by removing it from the wall plate for 30 seconds. Reconnect to your 2.4GHz Wi-Fi band. This forces a fresh handshake with the Resideo servers and wipes temporary cloud overrides.
• Check for "Eco" Mode Conflict: Some utility companies provide "Demand Response" programs that integrate with the RTH9585WF. Check your app for any "Eco" or "Energy Savings" badges. If your utility provider has a "Smart Savings" agreement, they can remotely override your schedule during peak hours. You must opt-out through your energy provider's portal to stop this.
• Verify Time Zone and DST Settings: If the schedule is shifting by exactly one hour, the internal clock is out of sync. Go to Menu > Preferences > Clock. Ensure the time zone is correct and that Daylight Savings Time (DST) is set to Auto. If the server time differs from the local time, the schedule will trigger at the wrong hour.
• Factory Reset and Manual Setup: If the logic remains erratic, perform a full reset. Go to Menu > Preferences > Reset and select All Settings. Do not reconnect to Wi-Fi immediately; program your schedule manually on the wall unit first. Only then connect to the app to see if the cloud overrides return.

Heads Up

• C-Wire Dependency: Ensure your RTH9585WF has a dedicated C-wire (Common wire). If you are using a power-stealing workaround, the Wi-Fi chip may intermittently reboot, causing the thermostat to lose its place in the schedule and default to a "Hold" state.
• 2.4GHz vs 5GHz: This model is strictly compatible with 2.4GHz networks. If your router uses "Smart Steering" (merging both bands), the thermostat may drop the connection and fail to update the schedule, leading to "stuck" temperature settings.
• Avoid Overlapping Setpoints: When programming, ensure there is at least a 15-minute gap between schedule periods. Overlapping time slots can cause the software to glitch and ignore the second command entirely.