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HVAC monitoring from Google Nest


HVAC monitoring is a thermostat feature that can help you identify potential issues with eligible heating, ventilation and air conditioning (HVAC) systems. If a potential issue is detected, we’ll send you an alert via email or a Google Home app notification.

Google Nest HVAC monitoring is available in eligible regions in the US and Canada.

How HVAC monitoring works

Sometimes, your HVAC system shows warning signs that it’s having issues. For example, if it takes longer than normal to cool your home, there might be a problem with your cooling system (AC). If your Nest thermostat detects these unusual or unexpected patterns, we may send you an email alert or a Home app notification. 

The alert email or notification will tell you what your thermostat noticed and which system (heating or cooling) may have been affected. You may also be shown contact information for a Pro, if you have one recorded in your thermostat or if you are in an eligible region. 

Important: HVAC monitoring is not meant to replace the diagnosis of a qualified HVAC professional. We make no endorsement, representation, or warranty about the health of your HVAC system. You may still experience issues with your HVAC system that we don't alert you to.

Eligible HVAC systems

HVAC monitoring is currently available for forced air HVAC systems, which use vents to move air through your house. Radiant systems, which have radiator or in-floor heating, are not eligible for HVAC monitoring at this time.

HVAC monitoring is currently available in the US and parts of Canada.

Types of HVAC alerts

Urgent alerts

If your thermostat detects an issue that may require immediate attention, we will send you an urgent alert as soon as it detects the problem. For example, if you turned on your heating system but your home became colder, you may have a severe problem with your heating system.

We notify eligible users about these urgent alerts:

Learn more about how urgent alerts work.

Early warnings

If your thermostat detects an issue that should be fixed soon, we will send you an early warning alert within a week of detecting the problem. For example, if your gas furnace briefly stops heating several times during its operation, you may have a problem with the flame sensor. If this problem isn’t fixed, it could cause your furnace not to heat at all in the future. 

Note: To trigger an early warning alert, a detected issue must meet a threshold set by Nest. 

We notify eligible users about these early warnings:

  • Your heating system briefly stopped heating your home several times
  • Your A/C system briefly lost power several times
  • Your A/C ran longer than expected
  • Your heat pump is not efficient
  • Filter reminders (based on run time)

Learn more about how early warnings work.

What to do if you get an alert

If you get an HVAC monitoring alert from Nest, you can choose what to do next. You may want to take some of these steps:

  1. Check for issues outside your HVAC system. For example, if someone left the back door open while the air conditioner was on, your A/C system may have been unable to cool your home as expected. 
  2. Learn what different HVAC monitoring alerts mean. In some cases, you may be able to identify and fix the problem yourself. 
  3. Get HVAC Pro assistance. Some of our alerts include a pro’s contact information or a way to book a pro on Handy.
    • In some regions, if you want to get emails from us about Pro booking services that you are eligible for, you may need to sign up for Nest marketing emails.

Manage settings or opt out of HVAC monitoring

 If you have an eligible Nest thermostat, you’re automatically opted into HVAC monitoring. 

  • If you use a Google Account, you’ll always get urgent alert notifications, but you can opt out of urgent email alerts and early warning email or Home app notifications by turning them off with the Home app. 
  • If you use a non-migrated Nest Account, you can only get urgent or early warning emails. You can turn off early warning emails by opting out in the footer of those emails.
  • You cannot opt out of HVAC urgent alerts because they let you know about serious issues that you need to be aware of. 

Manage HVAC settings with the Home app

  1. Open the Home app Google Home app and then tap Settings .
  2. Under “Features,” tap Notifications and then Thermostat and then HVAC monitoring and then select your preferred settings. 

Manage filter reminder settings with the Nest app

  1. Open the Nest app Nest app icon and then select your thermostat.
  2. In the top right corner, select Settings Nest settings icon and then Equipment and then Air filter reminder and then choose your preferred settings.

Manage filter reminder settings with the Home app

  1. Open the Home app Google Home app and then tap your thermostat and then Settings .
  2. Select Notifications and then Air filter reminder.


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