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Honeywell RTH6400D 5-1-1-Day Programmable Thermostat
 
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Honeywell RTH6400D 5-1-1-Day Programmable Thermostat

Other products by Honeywell
4.5 out of 5 stars  See all reviews (65 customer reviews)

List Price: $69.99
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8 new from $49.94
Special Shipping Information: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.

Frequently Bought Together

Customers buy this item with Delta Faucet 75152 Water Amplifying Adjustable Showerhead with H2OKINETIC Technology, Chrome  DELTA FAUCET

Honeywell RTH6400D 5-1-1-Day Programmable Thermostat + Delta Faucet 75152 Water Amplifying Adjustable Showerhead with H2OKINETIC Technology, Chrome

What Do Customers Ultimately Buy After Viewing This Item?


Technical Details

  • Large backlit display with soft-touch button interface
  • Precise temperature control of plus-or-minus-degrees Fahrenheit with auto change from heat to cool
  • Energy Star Rated 5-1-1 programming with 4 programmable periods per day
  • Exclusive Honeywell Smart Response Technology and filter change reminder
  • Compatible with heating and cooling system plus single stage heat pump systems

Product Description

Amazon.com Product Description

Maximize comfort, reduce household energy use, and save money with the RTH6400D 5-1-1 Programmable Thermostat from Honeywell. Featuring a user-friendly design that lets you program weekdays, Saturdays, and Sundays separately, this thermostat makes it easy to sync your home's heating and cooling system with your schedule, and it is Energy Star rated for efficiency you can count on.

The RTH6400D 5-1-1 Programmable Thermostat offers:
  • Separate programming for weekdays, Saturdays, and Sundays
  • Effective energy expense savings
  • Backlit display and easy push-button design
  • Intuitive adjustment for precise comfort control
  • Compatibility with a range of heating and cooling systems

Convenient and Efficient for At-Home Comfort
You know that turning down your heat at night saves you money, but you hate waking up and making breakfast in a freezing cold kitchen. Or you don't want to run your AC all day while you're at work, but you want your home to be cool and comfortable when you get home. That's where a programmable thermostat makes all the difference.



The customized settings add luxury to your home while affording you valuable savings on your energy bill. View larger.


Every day is unique. With this thermsostat, enjoy the freedom of pre-programming to fit your different daily needs. View larger.
Offering you the ability to program weekdays together and Saturdays and Sundays independently and allowing you to customize temperatures for four periods per day, this thermostat makes it simple to heat or cool your home for optimum comfort.

An Easy Way to Save Energy and Money
If programmed as directed, this thermostat also offers you the ability to save up to 33-percent on annual heating and cooling costs (savings may depend on the geographic region you live in and your energy usage). And it is ENERGY STAR rated in recognition of its energy saving capability. When it does come time to change the thermostat's battery, an easy-access compartment makes battery replacement fast and painless.

Exclusive Technology for Reliability and Ease of Use
Programming and monitoring the thermostat is simple with a soft-touch button interface and an easy-to-read display that shows the current room temperature and the set temperature simultaneously. This display is backlit, making it easy to see even in dimly lit rooms and hallways. All readouts are rendered in natural language instead of confusing symbols, and you can select whether you would like temperature readouts to appear in Fahrenheit or Celsius.

The thermostat features Honeywell Smart Response Technology and a feature that enables Auto Changes from Heating to Cooling, which continually adjusting the pre-heating or cooling of your home for effective results and precise comfort control within one-degree F of your desired temperature. The thermostat offers temporary and permanent hold settings for greater convenience.

Broad Compatibility for Use with Your Existing System
This thermostat is compatible with a broad range of 24-volt heating and air conditioning systems, including single-stage heating and cooling, heat pump systems without auxiliary (back-up) heat, gas fireplaces, and heating only or cooling only systems. It is not compatible with multi-stage heating and cooling, heat pump systems with auxiliary (back-up) heat, and electric baseboard heat (120-240 volts).

About Honeywell
With over 120 years of trusted reliability, Honeywell International is a diversified technology and manufacturing leader, serving customers worldwide with aerospace products and services; control technologies for buildings, homes and industry; automotive products; turbochargers; and specialty materials.

Whether you're flying on a plane, driving a car, heating or cooling a home, furnishing an apartment, taking medication or playing a sport, Honeywell products touch most peoples' lives everyday. Honeywell technologies are found in more than 150 million homes, 10 million buildings and a multitude of manufacturing plants around the world.

What's in the Box
RTH6400D 5-1-1 Programmable Thermostat, wire labels, wall anchors, mounting hardware, and an installation and user guide


With personalized temperature control, your household enjoys comfort day and night.

Product Description

Programmable 5 1 1 day with 4 program periods per day. For heating and air conditioning systems. Large backlit display with menu driven programming. Soft key controls. Shows room and set temperature. Exclusive Smart Response technology. Compatible with most electric, gas oil single stage furnaces; heat pumps without backup heat; heat only, and cool only furnaces. Will not work on electric baseboard heat. Precise temperature control + 1 F. Automatically switches from heat to cool to adjust the preheating cooling of your home so you can feel comfortable at your programmed times. Battery powered. Approximate size: 3.75'' H. x 6'' W. x 1.25 W. Off white. ENERGY STAR rated.

Product Details

  • Product Dimensions: 3.2 x 9 x 8.2 inches ; 11.7 ounces
  • Shipping Weight: 12.8 ounces (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • ASIN: B001FWZ7I2
  • Item model number: RTH6400D
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (65 customer reviews)
  • Amazon.com Sales Rank: #806 in Home Improvement (See Bestsellers in Home Improvement)

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    #6 in  Home Improvement > Heating & Cooling > Thermostats & Accessories > Thermostats > Programmable
  This Product Is ENERGY STAR® Qualified
Products that earn the ENERGY STAR prevent greenhouse gas emissions by meeting strict energy-efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy--plus they help us all save money while making a difference. Find out more about ENERGY STAR.

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Customer Reviews

65 Reviews
5 star:
 (43)
4 star:
 (17)
3 star:
 (2)
2 star:    (0)
1 star:
 (3)
 
 
 
 
 
Average Customer Review
4.5 out of 5 stars (65 customer reviews)
 
 
 
 
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Most Helpful Customer Reviews

 
29 of 31 people found the following review helpful:
4.0 out of 5 stars Good but not Great yet, December 20, 2008
By illbwolf (Vallejo, CA United States) - See all my reviews
The product came with easy instruction on how to install the unit. It only took me 15 mins to finish the setup. I like the big screen and the 7 days program which my old unit didn't have. The instruction for setting up the program is very easy to use. The only thing I would complain is the backlight; it only last 2 to 5 seconds and it doesn't have a button for backlight. In order to see at night, you have to press any of the button. When you press any of the button, the light will come on but it also changes the setting. You have to press the run schedule again to retain back to normal. That is the only annoying part. I bought this unit for 2 reason, one is the Font size and the second is backlight. I hope the newer product will retain the light longer than 2 seconds, and there will be a button for backlight. Besides the minor glitch, the unit is good. 4 stars.
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15 of 15 people found the following review helpful:
5.0 out of 5 stars well worth it, February 15, 2009
By Wayne Pieper "shadowdwpp" (Harrisburg, pa United States) - See all my reviews
(REAL NAME)   
I installed this unit back in September and it has saves about 27% of our normal heating fuel usage compared to the simple mercury switch unit it replaced. if only I had taken the plunge a few years ago I could have saved $1000's just for spending $70. It is intuitive if you want the temp to be 69 at 7 am and it is currently 64 at 630 it will start up ahead of time so when the desired time hits it will be the temp you specified.
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12 of 12 people found the following review helpful:
4.0 out of 5 stars Took a bit longer than 15 min, June 14, 2009
I installed the thermostat today and it took me 4 hours. I had 2 additional wires that it didn't cover in the directions. The R wires and the jumper was a bit vague and I had an O & W wire for the same location on the unit. I had to trial and error it for a bit and when I did get it to work initially it came out as heat (not good when it was already 85 in the house here in central Florida). I finally swapped the O for the W and had to wait a few minutes for the unit to come on and make sure it was on for Cold. Finally it was. Having a heat pump makes installation trickier than the regular installs. If someone is having a problem with the heat pump install, keep the jumper in, red wire goes to the 2nd from the right, and use the O not the W wire.
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Most Recent Customer Reviews

5.0 out of 5 stars Auto Changeover Makes This a Winner!
We have two heating/cooling systems, one for each level of the home. Last month I bought a Lux 1500 based on the excellent reviews it got from Consumer Reports and Amazon... Read more
Published 1 month ago by R. Barrett

5.0 out of 5 stars Save $ now on your heating bill
You can realize some significant cost savings by installing this thermostat and lowering your temperature at night and while you are at work or away from home. Read more
Published 1 month ago by Joseph A. Beck

4.0 out of 5 stars Easy to program and easy to use.
I bought this to replace an other Honeywell, which was a non programable unit. So far i have to say it does exactly what it claims to do. Read more
Published 1 month ago by Paul Brown

5.0 out of 5 stars Just what I was looking for
I replaced an old mechanical thermostat with this unit. What a difference! It does a terrific job of controlling the room temperature. There are 2 programmable cycles. Read more
Published 2 months ago by Vincent D'Amico

1.0 out of 5 stars No Differential Temperature Control
I had a Lux digital Thermostat for my heat pump and thought I would upgrade to a Honeywell RTH6400. I immediately noticed the heat pump was turning on for 8 to 12 minutes, and... Read more
Published 3 months ago by T. Swanson

1.0 out of 5 stars Energy Waster
There is no cycle or "swing" adjustment on the current Honeywell digital thermostats. They are set for a "swing" of plus or minus one degree. Read more
Published 3 months ago by Alan Barker

4.0 out of 5 stars Easy to install, easy to program, a very simple way to save energy and money
I didn't buy this for the energy savings. I bought it because our old thermostat, which was already installed when we bought our house about 5 years ago, gave up the ghost. Read more
Published 3 months ago by Nathan Andersen

4.0 out of 5 stars Good Product
I just wanted to comment on some reviews of this thermostat. Some reviewers state that to get the backlight to come on you have to press a button, and by pressing that button it... Read more
Published 3 months ago by R. Freeman

5.0 out of 5 stars Excellent Thermostat
I recently purchased two of these thermostats to replace two Honeywell thermostats that were 11 years old. Read more
Published 3 months ago by J. Norman

4.0 out of 5 stars Simple to use
I'd give this product a five, but the instructions say to line up the wires with the colors, and if you do that, you won't get heat. Read more
Published 3 months ago by RedRocker

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