These installation instructions also include sections of the proper use of the Honeywell Programmable Thermostat (model numbers RTH6450 and RET95E). It features sections that discuss the schedule programming and changing of batteries.
Sections in this Manual
- Turn Off Power to Heating/Cooling System
- Remove Old Thermostat
- Label Wires with Tags
- Separate Wallplate from New Thermostat
- Wallplate
- Connect Wires
- Install Batteries
- Install Thermostat onto Wallplate
- Turn Power Back On
- Advanced Installation
- Changing Settings
- About your new thermostat
- Thermostat controls
- Program Schedule
- Built-in compressor protection
- Battery replacement
- Troubleshooting
- Warranty
- FAQs
Honeywell Programmable Thermostat Owner’s Manual
Honeywell Programmable Thermostat Owner’s Manual
This is a legacy product document supported by Resideo. It is no longer manufactured
Read and save these instructions.
For help please visit: yourhome.honeywell.com
Installation is Easy
- Label wires and remove your old thermostat
- Install and wire your new thermostat
- Set your new thermostat to match your heating/cooling system
- It is preset for the most common system
Do you need assistance? We are here to help.
Call 1-800-468-1502 for wiring assistance before returning the thermostat to the store.
ATTENTION: MERCURY RECYCLING NOTICE
This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury should not be discarded in household trash.
For more information on how and where to properly recycle a thermostat containing mercury in the United States, please refer to the Thermostat Recycling Corporation at www.thermostat-recycle.org.
For mercury thermostat recycling in Canada, please refer to Switch the Stat at www.switchthestat.ca
Turn Off Power to Heating/Cooling System
Remove Old Thermostat
Remove old thermostat but leave wallplate with wires attached.
Label Wires with Tags
Label the wires using the supplied wire labels as you disconnect them.
Separate Wallplate from New Thermostat
Remove wallplate from the new thermostat and mount onto wall.
Wallplate
Mount Wall plate
Mount the new wall plate using the included screws and anchors.
- Drill 3/16-in. holes for drywall
- Drill 3/32-in. holes for plaster
