If so, your thermostat may go into setup mode that can result in blinking cool on indicator.

Changing batteries in honeywell thermostat. Place the new battery in the position of the older battery. First, locate the battery cover on the back of the thermostat. Wait five minutes after removing.

Next, gently pull the cover away from the. Now pull the cover with your fingers to take the cover off. Remove the depleted batteries and replace.

Take out the cover and replace the battery. Remove the old batteries, noting where the positive and negative ends are placed. How to fix a honeywell thermostat that isn’t working disconnect all of the cables from the thermostat.

Once you have taken off the cover it is. Gently press the side of the thermostat to retrieve the battery compartment. Then, use a phillips screwdriver to remove the two screws that secure the cover in place.

Changing batteries of honeywell thermostat. Take out the dead, old batteries. Remove the old batteries and replace them with new ones.

Put the new batteries in the compartment and slide the protective plate over them. Turn off your thermostat, open the battery compartment on the front, and remove the batteries. Some honeywell thermostats use an aa battery or aa alkaline batteries, while others use aaa batteries.