Nest thermostats will warn of possible problems with your AC or furnace

You might not have to wait until your home is frigid to find out that there's a problem with your furnace. Google has started testing a Nest thermostat feature that sends email alerts when the device detects unusual patterns in your HVAC system. If it's taking an oddly long time to warm up your house, you might get a notice well before there's a full-fledged breakdown.

from Yahoo Tech https://ift.tt/2Ob52tw