In this video I instructions for the correct and easy way to replace the two AA(double A) batteries in a Honeywell pro series T4 thermostat. When the batteri.. If your Honeywell thermostat requires batteries, it's normal to feel worried about finding the right battery size for your thermostat. Thankfully, Honeywell decided to make things easy by requiring fairly commonplace batteries. Most of their models will require either AA or AAA batteries. To find out how many and the specific size you need to.
Check the digital display if your thermostat has one. Many Honeywell thermostat models have a display that shows you the status of the batteries. Watch for a blinking battery symbol, a battery symbol with the text BAT inside, or a battery symbol with only one or two power bars inside to know if your battery is running low.. Otherwise, the company recommends changing the battery yearly or before leaving home for over a month. You usually have around 6 to 8 weeks to replace the battery and get another warning screen before the thermostat stops working. Replacing the Battery in a Honeywell Thermostat. Follow these six steps to replace the battery in a Honeywell.