Why My Ecobee Fan Keeps Running Even When It’s Off?

Written by

Ojash

Reviewed by

Hashir

Last updated: November 19, 2024

Expert verified

The system is off but your Ecobee thermostat fan still keeps running? Having faced this issue myself and after trying different fixes, I have put together this guide to help you deal with it in simple and effective steps. Read to know more.

Why Is My Ecobee Fan Always ON?

Below, I have detailed why your Ecobee fan may keep running and how you can fix that: 

1. System’s Thermostat Settings

🌀 Fan Control Settings:

I realized my Ecobee fan was set to ‘On,’ causing it to run continuously. This setting is useful for constant air circulation but can lead to higher energy costs. To switch your Ecobee fan from “On” to “Auto,” follow these quick steps:

1. Navigate to the Quick Settings menu on your thermostat.
2. Select the Fan option.
3. Switch from On to Auto.

This ensures that the fan only runs during heating or cooling cycles or as per the minimum runtime you’ve set​​.

⏲️ Minimum Fan Runtime:

I also found that my fan was set to run for a minimum amount of time each hour which extended its runtime unnecessarily. Here’s how I adjusted this setting:

On the Ecobee Thermostat

1. Go to the Main Menu on your thermostat.
2. Selecting Fan > Auto.
3. Set the minimum runtime to a lower value or even zero if you don’t want the fan to run outside of heating or cooling cycles​​.

On the Ecobee app

1. Open the Ecobee app and tap Home .
2. Navigate to Thermostat > Menu > System > Fan.
3. Finally, set the desired runtime.
4. Go back, and the changes will be saved.

🔥❄️ Heat/Cool Dissipation Time Settings:

After a heating or cooling cycle, your Ecobee fan can keep running for some time to push out any remaining warm or cool air so that the energy used for heating or cooling doesn’t go to waste. This is known as the heat/cool dissipation time. This wasn’t the case with me but here is how to fix it:

1. Open Main Menu Ecobee thermostat.
2. Navigate to General > Settings > Installation Settings > Thresholds.
3. In the Threshold settings, go to Heat Dissipation Time to adjust the fan runtime after a heating cycle.
4. Similarly, go to Cool Dissipation Time to adjust the fan runtime after a cooling cycle.

The default setting ranges from 30 to 45 seconds, but you can set it to less than 30 seconds if you want the fan to stop almost immediately after the heating or cooling cycle ends​​​​.

2. Relay Switch or Fan Motor’s Malfunctioning

If adjusting the thermostat settings didn’t fix my Ecobee fan problem, I had to look deeper into my HVAC system, particularly the relay switch and the fan motor.

⚡ Relay Switch Issues:

I found that the relay switch controls the power supply to the fan. If it’s stuck in the ‘closed’ position, the fan runs non-stop, often due to a wiring problem, a fault in the switch itself, or a control board issue. I reached out to a professional to get it checked and repaired, which helped solve the issue.

The focus should be to:

1. Check the thermostat display and ensure it is not set to “Fan Only” mode. If it is, change it to “Auto” or “Off.”
2. Check the relays and sensors in the HVAC equipment to ensure they are functioning properly.

🌀 Fan Motor Problems:

The fan motor could also be at fault. Worn bearings or electrical issues in the motor can prevent it from shutting off properly. When I suspected that, I got a professional to diagnose and repair it, which restored the fan to its normal function.

Remember, HVAC systems can be complex, and attempting DIY repairs can lead to more problems or safety risks. If in doubt, it’s always wise to consult a professional. This approach worked for me, and it can help you, too.

3. Wiring Issues

The wiring between your thermostat and the HVAC system could also be at fault. To rule that out, inspect the wiring for any damage or loose connections. Loose or faulty wiring can cause the fan to run continuously. If you find any, reconnect or replace them immediately. Make sure that the wiring is correctly connected according to Ecobee’s installation guide.

If you’re not comfortable doing this yourself or if you’re unsure, contact a professional HVAC technician.

4. Ecobee Settings

Certain settings on your Ecobee thermostat can also cause the fan to keep running if not configured properly:

🔧 Smart Recovery Feature:

This feature helps your Ecobee learn your daily schedule and preferences by adjusting the heating and cooling accordingly. However, it can also cause the fan to run at odd times. You can disable the Smart Recovery feature by following these simple steps:

1. Go to the main menu on your Ecobee thermostat.
2. Select Settings.
3. Turn off both Heating Smart Recovery and Cooling Smart Recovery.

🛑 Hold Settings:

Your Ecobee allows you to set holds on your fan, which can keep your fan running without the rest of the HVAC system being on. It’s essential to check for any active holds that can cause the fan to run continuously. To activate or manage this setting:

1. Access the Quick Changes menu.
2. Select the option for Fan Holds.
3. Set the hold for a specific duration or deactivate any holds that might have been set mistakenly​​.

🛋️ Comfort Settings:

Comfort Settings let you set personalized temperatures for different situations, such as when you’re away, asleep, or at home. Incorrectly programming these settings can lead to longer or more frequent fan runtimes. Make sure your Comfort Settings are correctly configured for your lifestyle.

Here is how I do it:

1. Go to the main menu on your Ecobee thermostat.
2. Select Comfort Settings.
3. Choose the setting you want to adjust, such as Home, Away, or Sleep.
4. Set the desired temperature for that situation.
5. Save your changes.

Why Does My Ecobee Fan Keep Running – Final Words

This was all about fixing a continuously running Ecobee fan. Most of the time, messing around with a few seconds fixes the issue. But when it comes to dealing with wires and hardware stuff, it is best to rely on a professional!

Here are more articles you may find interesting:

• How Does Ecobee Humidity Control Work? A Smart Thermostat Guide
• Are Smart Radiator Valves Worth It or Not?
• The Ultimate Guide to Thread and Matter Light Bulb

Frequently Asked Questions

Ojash

Author

Hi, I’m Ojash! My journey into smart home technology began with a simple lighting upgrade that quickly turned into a passion. I was fascinated by how connected devices could completely transform everyday living. With over 7 years of experience, I now specialize in creating tailored smart home solutions that enhance comfort, convenience, and efficiency. Through my work at JustSmarter, I enjoy sharing practical advice and insights, helping readers confidently explore the smart home world.

Hashir

Reviewer

Hi, I’m Hashir, a tech enthusiast with a deep love for smart home innovations. My interest in technology has always been driven by the idea of making everyday life more streamlined and efficient. After years of experimenting with smart devices in my own home, I’ve made it my mission to share what I’ve learned with others. I focus on practical, easy-to-understand solutions that anyone can implement to enhance their home. Writing for JustSmarter allows me to connect with fellow tech lovers and help them take their first steps—or next steps—into the exciting world of smart homes.