Why is My Ecobee Not Cooling at Night? (9 Main Reasons Why!)

Ecobee is a family of home energy management products that help you save on your energy bills by controlling the temperature in your home. Ecobee products bring together the power of technology, design, and energy efficiency to provide comfortable heated or cooled living spaces.

Ecobee uses sensors to monitor room temperature and adjusts the temperatures in the home based on what’s best for your unique needs. The system uses occupancy sensors to determine when someone is in a room, then makes sure they’re comfortable without wasting energy.

However, they don’t always work perfectly and sometimes you might even notice that your Ecobee thermostat is not cooling your house properly during the night time. You might ask yourself, “Why is my Ecobee not cooling at night?” We know the answer!

An Ecobee might not cool your home at night time if the device’s temperature sensor is dirty, the sensor is damanged, your thermostat has drifted out of alignment with the Ecobee system, your Ecobee has experienced an electrical surge, your Wi-Fi is not communicating properly with the Ecobee app, a second Ecobee installed is causing interference, another device is using the same Wi-Fi or there may be an electrical wiring issue in your home.

9 Main Reasons Why Your Ecobee is Not Cooling Your Home at Night

Below are 9 common reasons why your ecobee might not be cooling at night:

1. The device’s temperature sensor may have become dirty.

The first reason for ecobee not cooling at night is that the device’s temperature sensor may have become dirty. That is, dust, fluff, and other things have built up on the sensor and are preventing it from reading the room’s current temperature accurately.

To clean the sensor, you can lift it from the back of your system and manually clean it with a microfiber cloth or a baby wipe. If there is a lot of grime or dust build-up, use mild household soap to get rid of as much dirt as possible.

Once you’ve cleaned off all of the grime, simply dry it off with your microfiber cloth or baby wipe and carefully place it in its place back on your Ecobee unit again.

2. The sensor may be damaged.

The second possible reason your ecobee is not cooling at night is that the sensor has become damaged. This could happen if you do not carefully remove the sensor from your unit when changing room temperatures or if you place the sensor in direct sunlight for an extended period of time.

If you’re using the ecobee4 and have tested it for over a few months, and it still does not seem to be working properly, it’s best to replace it with a new one from Amazon.

Ecobee 4

3. Your thermostat may have drifted out of alignment with your ecobee system.

Your ecobee thermostat can drift out of alignment with your temperature sensors. You’ll know this has happened if the temperature in your home suddenly becomes cold or warm all at once and only lasts for a short period of time before your desired temperature is restored.

To fix this, you can either manually move the thermostat one degree at a time until it is back in alignment or you can replace the thermometer sensor. Once you have re-set your thermostat to bring it back into alignment with your ecobee system, it will be able to cool and heat properly for many months of use.

4. Your Ecobee has experienced an electrical power surge.

One of the most common reasons for ecobee not cooling at night is that it has experienced an electrical power surge. This can damage the internal circuitry of your Ecobee, so that it is no longer able to adjust the temperature in your home to your desired specifications.

You can expect this problem to be fixed by replacing the internal circuitry on your Ecobee with a new one or by replacing ecobee altogether with a brand new ecobee4 unit.

5. Your systems Wi-Fi is not communicating properly with the Ecobee app.

The last possible reason that your Ecobee might not be cooling at night is that your system is simply no longer communicating properly with the app. This could happen for a number of reasons, but the most common one would be either a bad connection or a weak Wi-Fi signal.

To remedy this problem, you can try moving your ecobee closer to its Wi-Fi router, you can try turning off some other electronic devices in your home (since they may be using up bandwidth and slowing down the connection), or you can get an extender from Amazon that will boost your Wi-Fi signal throughout your home.

6. Another ecobee thermostat has been installed in your home.

One of the most common reasons that a new thermostat would be installed in your home would be to replace your broken or outdated one. If you have another ecobee thermostat installed in your home, it will likely break down within a matter of months, and if you continue using it, it is possible that it will stop communicating with your ecobee system entirely.

To fix this problem, you need to repair the connection between the two thermostats, rebuild the software on each one to ensure that they are working properly together again, and then configure them to work together by following the instructions outlined on our troubleshooting page.

7. Another device uses the same Wi-Fi.

It is possible that another device in your home is using the same Wi-Fi, causing your Ecobee system to have trouble keeping a constant connection with your router and the internet. If you believe this might be the case, check to see if you can stream music or download files from other devices in your home.

This may cause issues with your ecobee if you are trying to use high bandwidth applications too close to the system. To fix this problem, you can try moving your other devices around or get a repeater from Amazon, which will boost your Wi-Fi signal throughout your house.

8. There may be an issue with the electrical wiring in your home.

A common reason a thermostat will stop working is that there is a loose or damaged connection in your home’s electrical wiring. This can be caused by damage from an earthquake or other catastrophe, or it can be caused by the old drywall being removed from your walls and not being properly reinstalled.

To ensure that the ecobee is able to communicate properly with your home’s electrical system, you can get a certified electrician to check everything for you.

Why is My Ecobee Not Cooling at Night? – Conclusion

What are the causes of ecobee not cooling at night? As you can see from the above list, most of the reasons for this issue are fairly easy to fix. For example, if your sensor is dirty or damaged, then all you have to do is replace it or clean it off with soap and water.

If you have a hard time deciding which one of these fixes will work best for you, feel free to ask our experts in the comment section below. If they cannot help you figure out how to fix it on your own, then they can recommend another product that best fits your home’s needs.

If you enjoyed this article, check out our “Why is My Ecobee Not Blowing Cold Air?” article here!

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