Honeywell YTH9421 Support Question
Honeywell YTH9421 Support Question
Find answers below for this question about Honeywell YTH9421.Need a Honeywell YTH9421 manual? We have 1 online manual for this item!
Question posted by Xmark124 on July 20th, 2013
How To Replace Th9421c1004 With A Ythx9421r5051 (honeywell Thermostat )?
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Current Answers
Related Honeywell YTH9421 Manual Pages
Owner's Manual - Page 2
... and other patents pending. For assistance with your fingertip. Never use sharp instruments, such as a pencil or pen, to the thermostat, always press keys with this product please visit http://yourhome.honeywell.com or call Honeywell Customer Care toll-free at 1-800-468-1502
Read and save these instructions.
® U.S.
BE CAREFUL! This...
Owner's Manual - Page 3
Table of contents
VisionPRO® IAQ
About your new thermostat Programming at a glance 2 Quick reference to controls 3 Quick reference to status display......... 4
... Humidity control 17 Ventilation control 19
Appendices Advanced functions 20 In case of difficulty 27 Limited warranty 29
This thermostat is below 50˚F (10˚C).
1
69-1815EFS-06 See page 2 to go ! CAUTION: ...
Owner's Manual - Page 4
... to Auto See page 6 3. Then check the settings below and change if needed: 1. Just set the time and day. Operating Manual
About your new thermostat
Your new thermostat is pre-programmed and ready to go to bed at any time, and manually adjust the temperature (see pages 10-11).
69-1815EFS-06
2
Owner's Manual - Page 9
...
VisionPRO® IAQ
Press the SYSTEM button to select, then press DONE:
• Heat: Thermostat controls only the heating system.
• Cool: Thermostat controls only the cooling system.
• Off: Heating and cooling systems are off. • Auto: Thermostat automatically selects
heating or cooling depending on the indoor temperature. • Em Heat (only...
Owner's Manual - Page 10
This thermostat is pre-set to program your heating/cooling expenses by as much as 33%. (See next page to adjust times and temperatures of each day. ...
Owner's Manual - Page 15
... displayed on the indoor temperature.
Compressor Protection: This feature forces the compressor to wait a few minutes before restarting, to replace filter or UV lamp.
Adaptive Intelligent Recovery: This feature allows the thermostat to "learn" how long the furnace and air conditioner take to reach programmed temperature settings, so the temperature is reached...
Owner's Manual - Page 17
... 30 seconds, press DONE to resume normal operation, or press SCREEN again if you can clean the screen without changing any liquid directly on the thermostat. SCHED HOLD CLOCK SCREEN MORE
15
69-1815EFS-06 The screen will remain locked for 30 seconds so you require more time for cleaning. Use...
Owner's Manual - Page 18
... indoor remote sensor is installed, the display shows the indoor temperature at the location of temperature readings from all sensors or an average between the thermostat and the sensor(s).
69-1815EFS-06
16
Owner's Manual - Page 19
Once frost no longer appears, the thermostat will not be displayed.
17
69-1815EFS-06 Press DONE to save & exit
5
FROST DEHUMIDIFIER
55
CANCEL
Press MORE until the humidifier screen is displayed, ...
Owner's Manual - Page 20
... activate it as needed to reduce humidity (may cool as much as 3°F lower than your temperature setting). If you don't have a dehumidifier, the thermostat activates the air conditioner to reduce humidity. Note: Auto/Off only present when using a whole house dehumidifier (not present when dehumidifying with A/C).
69-1815EFS-06
...
Owner's Manual - Page 21
... until the ventilation screen is displayed, then press s or t to 180 minutes, in 20-minute increments. Ventilation can still be requested by the installer, the thermostat will turn off /on the automatic ventilation only. You can set the timer to ventilate from 20 to set the ventilation timer. Ventilation control
Press...
Owner's Manual - Page 24
... default Energy Star settings
Backlight
Function 0280
Options:
Press s/t to turn the program schedule on low intensity, full bright after keypress
69-1815EFS-06
22 Thermostat is non-programmable. 4 Program schedule is off.
Owner's Manual - Page 25
...; IAQ
Temperature format (°F/°C)
Function 0320
Press s/t to set the temperature display format:
Options: 0 Fahrenheit 1 Celsius
Daylight savings time on/off
Function 0330
The thermostat is pre-programmed to automatically adjust to daylight savings time (2007 and beyond, for areas that use the new 2007 DST calendar) 2 On: Auto-change...
Owner's Manual - Page 29
...to 32°C) • Cool: 50° to 99°F (10° to make sure the thermostat is normal. See Advanced function 0280 on . • Make sure furnace door is on page 22 for ... at heating & cooling system is closed securely. "Err" appears on screen
• Contact your thermostat, please try the following suggestions. Your equipment may need service or repair.
27
69-1815EFS-06...
Owner's Manual - Page 30
Make sure the temperature is set
lower than the Inside temperature.
Auto indicates the thermostat is normal operation. Wait 5 minutes for "On" during this period (see page 13). If Auto and On is shown, the fan is set
cooling system
...
Owner's Manual - Page 31
... on how long an implied warranty lasts, so the above .
This warranty shall not apply if it is determined to be defective or malfunctions, Honeywell shall repair or replace it , with a bill of sale or other rights which you . or
(ii) call 1-800-468-1502. THIS WARRANTY IS THE ONLY EXPRESS WARRANTY...
Owner's Manual - Page 32
... Inc. 1985 Douglas Drive North Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée 35 Dynamic Drive Toronto, Ontario M1V 4Z9
http://yourhome.honeywell.com
® U.S. D509151; M.S. 07-09 H25193 and other patents pending 69-1815EFS-06 Rev. US Patent No. 6,208,263; 6,373,376; 6,448,901; 6,926,076; 7,...
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