When Google Nest Protect detects emergency levels of carbon monoxide (CO), the Nest thermostat can automatically shut off your heating system to help protect your home and the people inside.
Emergency Shutoff lets Nest Protect tell your Nest thermostat that there’s an emergency in your home. During an Emergency Alarm caused by CO, the Nest thermostat will shut off your heating system for safety if it uses fossil fuels (such as gas or oil).
What you need for Emergency Shutoff to work
Emergency Shutoff is based on the type of system that you enter during thermostat setup. Shutoff for carbon monoxide only works with systems that use gas, oil or other fossil fuels. If you have an electric or other type of system, it won’t be an option in the Nest app or on the Nest thermostat.
Important: Emergency Shutoff relies on an active account in the Nest app that has both a Nest Protect and Nest Learning Thermostat. It also requires your home to have a working internet service and Wi-Fi connection to both your Nest Protect and Nest Learning Thermostat. The signal is relayed over the internet and can only work if the internet and Wi-Fi in your home are working.
When the heating will turn back on after an emergency
After your Nest Protect detects that a CO emergency has ended and your home air is clearing, your Nest Protect will communicate to your Nest thermostat. You will need to manually turn your heating back on again. Contact a professional technician to determine the source of your CO emergency.
Important: Since Nest has no way to tell if your boiler was the source of your carbon monoxide Emergency Alarm, you should not rely on this feature. Consult a professional technician to determine the source of CO. Emergency Shutoff is not a substitute for getting out of the house immediately and remaining outside until the alarm has cleared or emergency service has arrived. If carbon monoxide alarms persist, you should investigate the reason by contacting a qualified technician.
Your thermostat will maintain your Safety Temperatures even during a CO emergency. So if the temperature inside your home drops low enough during an Emergency Alarm, your Nest Thermostat will override the Emergency Shutoff and restart heating to help protect against burst pipes. Since Emergency Shutoff and Safety Temperatures work together, make sure that your Safety Temperatures are enabled and set to the temperatures you want.
Note: If your Wi-Fi network goes down before an alarm, your Nest Protect will not be able to communicate an Emergency Shutoff, or that an emergency event has ended, to your Nest Thermostat until your home Wi-Fi network is working again. Your Nest Protects will still try to communicate with each other. This communication does not use your home Wi-Fi network. Visit Nest Weave for more info.
Enable or disable Emergency Shutoff
By default, Emergency Shutoff for CO is On. You can change Emergency Shutoff with the Nest app or on the Nest thermostat.
With the Nest app
- Open the Nest app.
- Tap your Nest Protect.
- Tap Settings .
- Tap Works with Protect.
- Enable or disable Emergency Shutoff for CO alarms here.
On the Nest thermostat
- Go to Settings .
- Select Nest Protect.
- Select Yes to enable this feature or No to turn it off.
- Choose Done.
Note: You must have a Nest Protect added to your account in the app in order to have this option in the settings menu.
Emergency Shutoff will be disabled when your home is set to Away either manually or automatically. This is to help prevent damage from extreme temperatures if there’s no one home to silence a false alarm.