Ecobee Humidity Sensor not working? Check these 7 likely culprits.

Ecobee thermostats have a sensor that measures the relative humidity in your home and adjusts your thermostat accordingly. The Ecobee humidity sensors allow the thermostat to adapt to your home’s environment and energy use, but if the sensor isn’t working correctly, you’ll probably end up with other problems with your thermostat.

If you have an Ecobee thermostat and are having problems with the humidity sensor, try recalibrating the sensor and make sure the mode is set to “Home”. You can also try resetting the thermostat, and if all else fails, you can contact Ecobee customer support for further assistance.

Your sensor should be accurate and keep the humidity at its optimal level. If yours isn’t doing that, this article will help you troubleshoot the problem and get your humidity levels back to normal.

Ecobee Humidity Control Setting Thermostat Tutorial

How Do Ecobee Humidity Sensors Work?

Humidity sensors measure the amount of water vapor in the air. This information is then used to adjust the temperature and humidity levels in the Ecobee app. They are used in various applications, including weather forecasting, industrial process control, and residential HVAC systems.

Ecobee is a leading manufacturer of humidity sensors. Their products are used in various applications, including HVAC systems, weather stations, and industrial process control systems. These humidity sensors are known for their accuracy and ability to hold up in harsh environments.

Read: Why Ecobee Shuts Off Before Reaching Temperature? – Troubleshooting Guide

Features of The Ecobee Humidity Sensor

The Ecobee humidity sensor is a small, compact device that can be placed in any room in your house. It has several features that make it an ideal choice for measuring the humidity in your home.

Ecobee thermostat with humidity sensor

The Ecobee humidity sensor has a large, easy-to-read display that shows the humidity level in your home, as well as the temperature. The sensor also has an audible alarm that will sound if the humidity level in your home reaches a certain level.

Each humidity sensor is powered by two AAA batteries and will automatically shut off when the batteries are low. It has a low battery indicator that will let you know when the batteries need to be replaced.

The sensor has several features that make it an ideal choice for a variety of different settings:

  • High accuracy, with a ±10% margin of error
  • Quick and easy setup
  • It’s power efficient, with a life expectancy of up to 2 years
  • Compatibility with a variety of different Ecobee products

Read: Ecobee Lite 3 Vs. Ecobee Smart Thermostat: Differences, Worth Of Upgrade?

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Troubleshooting Common Ecobee Humidity Sensor Problems

Some users report that their Ecobeee sensor isn’t accurately measuring the humidity in a room. It can also happen that the sensor is not very responsive to changes in humidity levels.

This is always a nuisance, but it can become a serious problem if you or someone in your family has allergies that need to be kept under control. Even if no one in your household suffers from allergies, not keeping humidity levels under control can lead to mold growth.

Luckily, there are several fixes you can try. Let’s go over some of the most common issues and their solutions.

Sensor Readings are Wrong

If you’re troubleshooting common Ecobee humidity sensor problems, the first thing you should check is the battery. If the battery is low, it can cause the sensor to give inaccurate readings.

Ecobee mounting

Another common problem is that the sensor isn’t correctly calibrated. To fix this, you can recalibrate the sensor by following the instructions in your Ecobee manual. If you’re still having trouble, there are a few other things you can try, like resetting the sensor or moving it to a different location.

Read: Why Ecobee Thermostat Runs For 5 Mins And Then Shuts Off?

Sensor Keeps Saying “Calibrating”

If you’ve been using your Ecobee for a while, you may have noticed that it occasionally says “Calibrating” on display. This is nothing to worry about, but if it happens frequently, there may be an issue with your sensor. To resolve this issue:

  1. Try restarting your Ecobee. 
  2. If that doesn’t fix the problem, try resetting it to factory settings. 
  3. If that still doesn’t work, try contacting Ecobee support for further assistance.
Ecobee thermostat display

Sensors Are Showing N/A

One possible reason for this issue is that the sensors are not placed correctly in your room. Ecobee recommends placing sensors at least 3 feet (0.91 m) away from any wall or obstruction. Make sure that the humidifier or dehumidifier is turned off while you’re trying to get a reading—otherwise, the Ecobee will report N/A.

Read: Can I Use An Ecobee Thermostat In An RV?

Ecobee Keeps Restarting

If your sensor keeps restarting, there could be several possible causes. It could be a problem with the sensor itself, the power supply, or the battery. If you’re not sure what is causing the problem, you can try some troubleshooting steps to narrow down the possible causes.

  1. Make sure that the Ecobee is getting power. If the sensor is plugged into an outlet, try plugging it into a different outlet. If the sensor is battery-operated, try replacing the batteries.
  2. If the Ecobee keeps restarting, there could be a problem with the Ecobee itself. Try resetting the Ecobee by unplugging it for 30 seconds and then plugging it back in.
  3. If that doesn’t work, you may need to contact Ecobee Customer Support. 

Read: Can You Use Multiple Ecobee Thermostats In The Same House?

Ecobee Does Not Automatically Dehumidify

If your Ecobee isn’t dehumidifying automatically, there is likely an issue with its settings.

First of all, make sure that the sensor is set to the correct mode. The sensor should be set to the “Home” mode, not the “Away” or “Sleep” mode. Then, check that the dehumidifier function is turned on.

Auxiliary Heat Keeps Turning On

If the auxiliary heat keeps turning on, there are a few things you can try. 

  • Check the settings on your thermostat and make sure the temperature is set correctly. 
  • Try adjusting the weather sensitivity.
  • If all else fails, contact a heating specialist to come and take a look at your system.
Ecobee displaying temperature setting

UV Light Alert Constantly On

Ecobee is designed to automatically turn on the UV light when necessary to disinfect the air in your home. However, if you are seeing this alert more often than usual, it may indicate that your sensor is not working correctly.

Sadly, there isn’t too much you can do about this issue by yourself. If you see the UV Light Alert on your sensor more often than usual, it is best to contact customer support for assistance.

How To Calibrate Ecobee Humidity Sensor?

If you want your Ecobee to measure the humidity in your home accurately, you’ll need to calibrate the sensor. This process is relatively simple and only takes a few minutes. Here’s how to do it:

  1. Make sure that the sensor is in a stable environment. This means that the temperature and humidity should not change rapidly.
  2. Place the sensor in the room where you want to measure the humidity.
  3. Use a hygrometer to take a reading of the humidity in the room.
  4. Go to the Ecobee app or website and select the “Sensors” option.
  5. Find the sensor you want to calibrate and select the “Menu” option.
  6. Tap on “System Cool.”
  7. Turn on “Dehumidify Using AC”
  8. Enter the humidity reading that you just noted from the hygrometer.

Should You Leave Ecobee on Auto?

The answer depends on your specific situation. If you live in an area with high humidity, you may want to leave the sensor on auto so that it can adjust itself accordingly. However, if you live in an area with low humidity, you may want to turn the sensor off, so it doesn’t unnecessarily use up battery power.


If you’re having trouble with your Ecobee humidity sensor, you’re not alone. In most cases, simply resetting the sensor or adjusting the placement will do the trick.

However, if none of the methods listed in this article do the trick, you should probably call a professional. In the worst case, you may need to replace the sensor entirely. Thankfully, Ecobee offers excellent customer support and will likely be able to help you troubleshoot the issue.