How to Stop Your Nest Thermostat From Changing the Temperature (Updated 2023)

As a small business technology consultant, I‘ve helped many entrepreneurs deal with frustrating issues like having their Nest thermostat suddenly adjust temperatures on its own. If your Nest is overriding your preferred settings, you‘re not alone – over 40% of users report problems with unexpected temperature changes according to a recent survey.

Fortunately, there are several effective ways to prevent your Nest thermostat from changing the temperature. With a few simple tweaks to your settings, you can take back control and stop those annoying automated adjustments.

Why Does My Nest Thermostat Change Temperatures?

Before diving into fixes, it helps to understand what causes your Nest to alter temperatures in the first place. The device is designed to be a "smart" thermostat that modifies settings to align with your habits.

Two key features are often the culprits behind unexpected temperature changes:


This learning algorithm tracks adjustments you make to build a customized schedule. The goal is to predict and apply your temperature preferences automatically.

But when Nest doesn‘t have enough data, or inaccurately interprets your behaviors, the schedule may not match your ideal temps.

Home/Away Assist

Using built-in motion sensors, Home/Away Assist detects when you‘re home based on movement. When you‘re away, it will lower temperatures to save energy.

However, if the sensors have issues detecting occupancy accurately, this can lead to unwanted temperature changes.

How to Disable Nest‘s Automatic Temperature Changes

Now that you know what‘s causing the issue, here are 5 tips to stop your Nest from changing temperatures on its own:

Adjust Auto-Schedule Settings

In the Nest app settings, turn Auto-Schedule off completely or set your own temperature points to override the algorithm. You can also opt to keep Auto-Schedule on but make manual adjustments to correct any unwanted changes during the first weeks of use until Nest "learns" properly.

Nest App Auto-Schedule Settings

Disable Home/Away Assist

Since motion detection errors can cause problems with this feature, disable Home/Away Assist in your app settings. You‘ll override any automatic temperature changes when you‘re away.

Turn Off Early On

Early On uses Auto-Schedule data to start preheating your home before you wake up. Disable this in settings if you don‘t want Nest turning on your HVAC system in the mornings.

Disable Eco Mode

This setting adjusts temperatures to conserve energy based on algorithms. Turn off Eco Mode if you don‘t want Nest to make any automated adjustments.

Use Temperature Lock

Temperature Lock lets you set a minimum and maximum temperature range that requires a passcode to alter. This prevents others from changing your Nest temp.

To enable:

  • Go to Settings > Temperature Lock
  • Create a 4-digit passcode
  • Set your min and max temperature limits

Now changes can only be made with your passcode!

Ensure Your HVAC System is Compatible

In some cases, underlying compatibility issues between your HVAC equipment and Nest thermostat can cause problems.

According to a report from, over 85% of common home heating and cooling systems are compatible. But it‘s worth double checking.

Visit to verify your HVAC system will function properly with Nest‘s hardware and software. If you discover incompatibility issues, an upgrade may be required.

Contact Nest Customer Support

After trying the above suggestions, if your Nest thermostat still won‘t maintain consistent temperatures you‘ve set, it‘s time to contact the company‘s customer support team.

Reach out to Nest experts via:

Nest‘s team can provide additional troubleshooting tips or determine if your thermostat needs service or replacement under warranty. As a small business owner myself, I know the value of quality customer service!

Take Control of Your Nest With These Tips

Having your Nest thermostat automatically adjust temperatures when you don‘t want it to can certainly be frustrating. But a few simple tweaks to the settings and features covered in this guide can help you take back control.

The key steps are:

  • Turn off Auto-Schedule, Eco Mode, and Home/Away Assist
  • Set your own temperature schedule
  • Use Temperature Lock to prevent unwanted changes
  • Verify HVAC system compatibility
  • Contact Nest support if issues persist

With the right adjustments, you can stop your Nest thermostat from overriding your preferred temperatures. Let me know if you have any other questions!