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Eco mode is enabled, but the heater is still on when the room temperature is warmer than scheduled

DB812
Community Member

‎01-18-2024 08:52 AM

We got the Nest few weeks ago and have encountered multiple annoying issues:

 

1. We turned off the AC and only have heater on via Nest. But the Nest still turns on our AC once a while and blowing cold air in the bedroom. We found some other people encountered the same issue and thus we have to cut down the electricity to AC to avoid this happening again.

2. Under heater mode, we turned on ECO mode when we are ready to leave home. The room temperature is one degree higher than our scheduled temperature. But the heater remains running even after we turn on the ECO mode. Waited for few minutes and the heater is still on. Don’t know what to do and need to go. So we left home with lots of worries. 

Nest learning thermostat is supposed to help to save energy, but somehow I am afraid it did the opposite. Any idea how to fix the issue? Thanks!

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1 REPLY 1

zoeuvre
Community Specialist
Community Specialist

‎01-22-2024 09:39 AM

Hi DB812, 

 

Uh-oh! I'm sorry to hear that you're experiencing issues with your Nest Thermostat. Let's address each problem individually:

 

  1. This issue could be related to the wiring or configuration of your HVAC system. It's possible that there is a wiring issue or a compatibility problem between your Nest thermostat and your AC system. You may follow these:
    • Ensure that the wiring connections between your HVAC system and the Nest Thermostat are correct. Verify that the wires are securely connected to their respective terminals on the thermostat and that there are no loose or damaged wires. If there are any wiring issues, it's important to rectify them to ensure proper functionality.
    • Double-check the settings and configuration on your Nest Thermostat. Make sure that the AC mode is indeed turned off and that only the heater mode is active. You can do this through the thermostat's settings menu or by using the Nest app.
    • Ensure that your Nest Thermostat is running the latest firmware version. Updates can sometimes address bugs and improve the thermostat's performance. You can check for updates through the Nest app or the thermostat's settings.
    • If the issue persists, you can try performing a factory reset on your Nest Thermostat. This will reset all settings and configurations to their default values. 
  2. When you activate ECO mode, the Nest thermostat should adjust the temperature to save energy. However, it's possible that there may be a delay in the thermostat recognizing the ECO mode and shutting off the heater. In such cases, you can manually adjust the temperature setting to a lower value before leaving home instead of relying solely on ECO mode. This will ensure that the temperature is reduced before you depart. Additionally, you can monitor the thermostat remotely using the Nest app to verify if the heater eventually shuts off.
    • Verify that the ECO mode is configured correctly in the Nest Thermostat settings. Make sure that the desired temperature in ECO mode is set to your preferred value. You can adjust this temperature to ensure it is lower than the current room temperature by more than one degree.
    • After activating ECO mode, it may take a few minutes for the Nest Thermostat to recognize the change and adjust the heating accordingly. It's possible that the heater will turn off automatically once the thermostat registers the ECO mode and reaches the desired temperature. You can wait for a bit longer to see if the thermostat eventually shuts off the heater.
    • Ensure that there are no conflicting temperature settings in your schedule. Sometimes, conflicting temperature settings can override the ECO mode and keep the heater running. Review the schedule settings in the Nest app or on the thermostat itself to ensure they align with your desired temperature changes.
    • If the issue persists, you can try setting the ECO temperature even lower than your desired value to see if the thermostat responds by shutting off the heater. This can help determine if there is an issue with the temperature threshold recognition.

 

Let us know if that helps.

 

Best,

Zoe

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