People in a handful of cities (Atlanta, Boston, Denver, Las Vegas and San Diego) will also get help contacting professionals through Handy, so you might not have trouble booking a service appointment.

HVAC warnings aren't completely new. Users have received alerts for more immediate problems. However, Google is now focusing on symptoms that may take a long time for humans to spot. In a sense, it's offering a peek at a future where your smart home does more to anticipate problems and help fix them before it's too late.