Step 1. Prepare for installation
Carefully unpack your new thermostat. Save your receipt and make sure you have the following parts:
Thermostat and mounting plate
Gather the needed tools and supplies listed below.
Required tools and supplies
Two AA alkaline batteries. Honeywell recommends Energizer®
Hand or power drill with 3/16-inch or 7/32-inch drill bit
Make sure that your heating and cooling systems are working properly. If there is a problem with either system, call a
heating/air conditioning contractor—the problem may persist after you install the new thermostat.
IMPORTANT: To avoid damaging the compressor in the air conditioner, do not operate the cooling system when the
temperature outdoors is below 50°F (10°C).
Screws and anchors
Installation and Programming Instructions
Wire cutter/stripper or sharp knife