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Model # RTH6450D

Internet # 202491353

Store SKU # 835702

5-1-1 Day Programmable Thermostat with Backlight

This item has been discontinued.
The Home Depot no longer carries this specific product.

$69.98 /each


Model # RTH6450D

Internet # 202491353

Store SKU # 835702

The Honeywell 5-1-1 Day Programmable Thermostat with Backlight allows you to keep your home at an ideal temperature at any time of day. The programmable function helps you to save money and energy by automatically adjusting the temperature during the day or night based on your settings. The thermostat features a backlit display and easy-to-use control buttons for simple operation.

  • 7-day programming allows you to adjust the temperature for 4 program periods per day
  • Simple, intuitive buttons offer convenience and easy operation
  • Compatible with almost all heating or cooling systems including heat pumps
  • Backlit display allows you to see the settings even at night or in dimly lit rooms
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Display height (in.) 
1.5 in 
Display width (in.) 
2.75 in 
Product Depth (in.) 
Product Height (ft.) 
Product Height (in.) 
Product Width (in.) 
Batteries Included 
Battery Power Type 
Battery Size 
Color Family 
Number of HVAC Zones 
Periods per Programmable Day 
System Compatible 
Thermostat Features 
Automatic Heating/Cooling Changeover,Backlit,Battery Operated,Low Battery Indicator,Removable Interface 
Thermostat Type 
Heating and Cooling 
Voltage (volts) 
Warranty / Certifications
Certifications and Listings 
No Certifications or Listings 
ENERGY STAR Certified 
Manufacturer Warranty 
1 Year Limited Warranty 


Rated 4.0 out of 5 by 24 reviewers.
Rated 4.0 out of 5.0 by good thermostat, programming a challenge The thermostat works just fine. We have a lot of Honeywells throughout our facilities. This particular one was purchased because of the auto heat/cool. Initially the auto feature was not appearing for heat/cool. You need to go into the advanced setup menu to access feature 12, then set it to auto switchover. The manual does explain this in the advanced setup section. It is very easy to do, but the thermostat did not come with this feature already enabled. That was probably a poor, but necessary choice on Honeywell's part. I would purchase this product again and recommend it to others. Just be prepared to do some more programming than you may have been used to. May 16, 2014
Rated 5.0 out of 5.0 by As Advertised: Easy Install Simple install with our furnace/air system. The install instructions were simple, concise, and yet detailed enough to make install a breeze. It powered right up and functioned perfectly. One piece of advice. For securing the thermostat wires to the terminals on the unit you need a very tiny flat head screwdriver. I happened to have a set of precision screw drivers, but if I hadn't it would have meant another trip to the store. It also does NOT come with the 2-AA batteries required for operation, so make sure you have those on hand. I thought the batteries were only for memory in case the power goes out, but the furnace cable does not power this unit. July 23, 2011
Rated 5.0 out of 5.0 by A very dependable product. It's easy to set and maintane the temprature you want. I was amazed how easy it was to install. Works well. August 25, 2015
Rated 4.0 out of 5.0 by Good Thermostat I literally had to quickly replace a thermostat that just stopped working. I chose this Honeywell and installed it. It works well and does the job. What else can I say? July 21, 2015
Rated 5.0 out of 5.0 by HVAC Thermostat I bought this for my parents house, their old thermostat was blown by a lightning strike to the house. Simple to wire, just match the wire colors and connect. The new thermostat is easy for them to use. They love the comfort improvement over the old thermostat that was also electronic. This thermostat holds the house within 1 degree and so far they have had no need to bump it up or down. They say the house is more comfortable than it has ever been. July 12, 2012
Rated 5.0 out of 5.0 by Great thermostat Took no time at all to wire this thermostat up. Programing it was easy too. March 6, 2012
Rated 2.0 out of 5.0 by Good but has an installation issue Price was good. However after I installed it found the heat would not work. After removing the faceplate found one of the middle prongs in back was bent. Broke when I tried to carefully straighten it. Now I have to but a new one. Had installed for just two weeks. Why make something where this can happen? I was careful but could this could happen to anyone. Liked the performance of this thermostat but not so sure I will buy another because same thing can happen. Called Honeywell and told too bad. October 13, 2014
Rated 4.0 out of 5.0 by Very Good Thermostat I purchased this item for a rental property and the tenant said that it is easy to program and works well. March 29, 2015
  • 2015-09-02T11:01:46.934-05:00
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