Google has started testing a new Nest thermostat feature that can help alert you to some heating and cooling system (HVAC) issues.

With this new feature, Nest is learning how to identify unusual patterns related to your HVAC system, and can alert you to a variety of potential issues. Since the majority of consumers don’t have an HVAC pro on speed dial, Google is also testing out the ability to help people connect with a professional who can help, starting in select cities.

Based on information like your thermostat’s historical data and current weather, Nest will learn to detect some unusual HVAC patterns that might indicate something is wrong. If it’s taking longer than normal to heat your home, for example, there might be a problem with your heating system—even if you haven’t noticed anything.

If your thermostat notices a potential issue, Google will send you an email alert telling you what your thermostat noticed and which system (heating or cooling) may be having a problem.

If you receive an HVAC email alert, you may want to have a professional take a look at your system. If a Nest Pro installed your thermostat or previously serviced your system and you want to hire them again, you can often find their contact information on your Nest thermostat or in the Nest app.

As part of this feature test, Google is also partnering with Handy, a platform that connects professionals with customers who need their services, to make it easy to find and book an HVAC pro with set pricing. Booking through Handy will initially be available in over 20 metro areas, including Atlanta, Boston, Denver, Las Vegas, and San Diego, and expand to additional regions throughout the testing period.

Sign up to get your Nest Home Report, and you’ll automatically receive these new HVAC alert emails. You can also opt out of getting these HVAC alerts at any time.