Honeywell RTH6400D Support and Manuals

Get Help and Manuals for this Honeywell item

View All Support Options Below
Free Honeywell RTH6400D manuals!
Problems with Honeywell RTH6400D?

Ask a Question

Most Recent Honeywell RTH6400D Questions

Honeywell Ret97e5d 1005/u
How can I get the owners manual or user guide for this thermostat?
(Posted by reyem44 7 years ago)
My Programmable Thermostat Is Flashing 'no Signal'. Have Checked The Breakers A
'no signal' - no heat. Checked the breakers = all is well there. New batteries. What is it? Only 2 y...
(Posted by sissyrotondi 8 years ago)
Heat Isn't Blowing
When we turn on the heat, we can hear it kick on and can hear it running but there is no heat blowin...
(Posted by hanusbrandon 9 years ago)
Switch Fahrenheit Setting To Celcius
how to switch from Farenheit to Celcius.
(Posted by bweir1974 9 years ago)
Temp. Control
i want to control temp. to aproimately 22 degrees c. 24/7 so I have temp. setting on hold.I have the...
(Posted by mkoch 11 years ago)

Popular Honeywell RTH6400D Manual Pages

Owner's Manual - Page 1

Quick Installation Guide RTH6400 Series Programmable Thermostat 69-2210EF-03
Owner's Manual - Page 2

Installation is preset for wiring assistance before returning the thermostat to match your new thermostat to the store. 69-2210EF-03 ii Call 1-800-468-1502 for the most common system We are here to help. It is Easy Label wires and remove your old thermostat Install and wire your new thermostat Set your heating/cooling system -
Owner's Manual - Page 11

M28347 9 69-2210EF-03 9 Install Thermostat onto Wallplate Install thermostat onto the wallplate on the wall.
Owner's Manual - Page 13

... volt or 750 mV systems. It will NOT work on page 13 to match your thermostat to provide heating. If your system type is: q Heat Pump* without Backup Heat q Heat Only q Cool Only Continue with advanced installation on multi-stage heat pump systems or 120/240 Volt systems. 11 69-2210EF-03...
Owner's Manual - Page 14

Advanced Installation System setup 13 Wiring 21 Troubleshooting 22 Customer assistance 25 Limited warranty 26
Owner's Manual - Page 15

M28349 Press NEXT to advance to exit and save settings. Function 1 Setting 0 Done Next Press DONE to next function. 13 69-2210EF-03 TROUBLESHOOTING RTH6400 ASybsotuetmyosuertunpew thermostat Press and hold the s and FAN buttons until the screen changes (approximately 5 seconds). SETUP WIRING ASSISTANCE M28348 Press s or t to change settings.
Owner's Manual - Page 16

M28351 69-2210EF-03 14 TROUBLESHOOTING When correct setting is selected, press NEXT to change setting. SETUP Advanced Installation Guide Function 1: System type Press the s or t button to select the..., oil or electric heating without central air conditioning. (Use this setting if you could turn the fan on and off with a fan switch on your old thermostat.) Press to display next function.
Owner's Manual - Page 17

... TROUBLESHOOTING Press to change setting. When correct setting is used in heating or cooling: NOTE: If Function 2 does not appear, please turn to the next page to continue. 20 Done Next M28352 0 Cooling changeover valve: Use this setting if you connected a wire labeled "O" to the O/B W wire terminal (see page 21). 1 Heating changeover valve: Use this setting...
Owner's Manual - Page 18

...2210EF-03 16 ASSISTANCE TROUBLESHOOTING Press to display next function. When correct setting is selected, press NEXT to change setting. SETUP WIRING Advanced Installation Guide Function 3: Heating fan ...Use this setting if you have a gas or oil heating system (system controls fan operation). 1 Electric heat: Use this setting if you have an electric heating system (thermostat controls fan ...
Owner's Manual - Page 20

TROUBLESHOOTING Press to display next function. When correct setting is selected, press NEXT to change setting. NOTE: System maintains a minimum 3ºF difference between heat and cool settings. M28351 69-2210EF-03 18 SETUP Advanced Installation Guide Function 12: Manual/Auto Changeover Press the s or t button to option 0 if the outside temperature drops below 50ºF (10º...
Owner's Manual - Page 21

... 1 Smart Response® Technology ON 0 Smart Response® Technology OFF NOTE: See Operating Manual for information on Smart Response® Technology. M28351 ASSISTANCE TROUBLESHOOTING 19 69-2210EF-03 SETUP WIRING RTH6400 Function 13: Smart Response® Technology Press the s or t button to change setting. When correct setting is selected, press NEXT to display next function.
Owner's Manual - Page 22

M28351 ASSISTANCE TROUBLESHOOTING 69-2210EF-03 20 When correct setting is selected, press DONE to change setting. SETUP WIRING Advanced Installation Guide AFubnocuttioynou1r4n: eTwemthpermatousrteadt isplay Press the s or t button to select Fahrenheit or Celsius temperature display: 14 0 Done Next 0 Fahrenheit temperature display (°F) 1 Celsius temperature display (°C) ...
Owner's Manual - Page 24

SETUP WIRING Advanced Installation Guide Troubleshooting If you have difficulty with your heating equipment (see page 16). Temperature Make sure heating and cooling settings do not temperatures are correctly installed (see page 14). Display is blank • Make sure fresh AA alkaline batteries are set to acceptable change • Check Function 1: System Type to system setting make ...
Owner's Manual - Page 26

SETUP Advanced Installation Guide Troubleshooting Heating • Check Function 1: System Type to and cooling equipment running in make sure it is set to match your cool mode heating and cooling equipment (see page 6). Check to make sure it is set to is running at the make sure turn off) bare wires are not touching each other (see...
Owner's Manual - Page 27

... ASSISTANCE TROUBLESHOOTING 25 69-2210EF-03 Accessories/replacement parts To order, please call Honeywell Customer Care toll-free at 1-800-468-1502. To save time, please remove the battery holder and note your model number and date code before calling. SETUP ACbuosutotmyoeur ransseiwsttahnecremostat RTH6400 For assistance with this product, please visit http://DIYthermostats.honeywell...

Honeywell RTH6400D Reviews

Do you have an experience with the Honeywell RTH6400D that you would like to share?
Earn 750 points for your review!
We have not received any reviews for Honeywell yet.

Popular Honeywell RTH6400D Search Terms

The following terms are frequently used to search for Honeywell RTH6400D support:

Ask a New Question
Use the box below to post a new question about Honeywell RTH6400D.
Manuals / Documents
Download any of our Honeywell RTH6400D manuals for free!

We have the following 1 documents available for the Honeywell RTH6400D:
  • Owner's Manual

Points & Prizes
  • You can earn points for nearly everything you do on HelpOwl.com
  • You can trade in those points for gift cards at leading retailers such as Amazon.com and Walmart
  • It's that simple!
See How it Works
Create a Free Account

Honeywell Manuals

Find free Honeywell RTH6400D manuals and user guides available at ManualOwl.com. Try out our unique manual viewer allowing you to interact with manuals from directly within your browser!

Honeywell Reviews

View thousands of Honeywell RTH6400D user reviews and customer ratings available at ReviewOwl.com.

Contact Information

Complete Honeywell customer service contact information including steps to reach representatives, hours of operation, customer support links and more from ContactHelp.com.

Scoreboard Ratings

See detailed Honeywell customer service rankings, employee comments and much more from our sister site.

Honeywell Recalls

Find comprehensive Honeywell recall information updated hourly on RecallOwl.com.