Winter is coming. It's almost heating season and a good time to check and/or replace your thermostat batteries. If your thermostat batteries are dying or dead, your heat isn't going to come on during the next chilly morning.
Most electronic wall mounted thermostats (ones that have a LED screen) have batteries. It's not always obvious where these batteries are located. They can be in a compartment accessible from the front or they can be hidden behind. If you can't find an obvious place for a battery, try googling "thermostat name/model changing battery".
Thermostat manufacturers recommend changing the batteries yearly. This is probably overkill if you have a heat only system as the thermostat is working for only part of the year. If you have a heat pump or A/C in addition to heat your thermostat is working throughout the year and may need yearly battery replacement due to the increased power demand.
Brian Jovag, owner of Jovag Home Inspection.