Honeywell T8401C Support Question
Honeywell T8401C Support Question
Find answers below for this question about Honeywell T8401C.Need a Honeywell T8401C manual? We have 1 online manual for this item!
Question posted by kvgoudy on December 24th, 2011
Digital Area Is Blank
ON our T8401C 1072 thermostat the digital display is blank. I believe there are no batteries to change. What do I need to do?
Current Answers
Related Honeywell T8401C Manual Pages
Owner's Manual - Page 1
M18539
1
69-1490
69-1490 Set
Room
FAN Auto On
SYSTEM Cool Off Heat
M18535
Em Ht Aux Ht
Set
Room
Electronic Thermostat
OWNER'S GUIDE
FAN Auto On
SYSTEM Cool Off Heat Em.Ht.
Owner's Manual - Page 2
... temperature at a glance.
• No need for you with a more comfortable and convenient living environment.
• Simple and easy to change your temperature setting.
• Large digital display. The ▲ and ▼ keys make it easy for batteries. Batteries are not required because your new thermostat! Congratulations on the purchase of this thermostat in memory.
69-1490
2 Over...
Owner's Manual - Page 3
... quality.
Settings
Setting FAN and SYSTEM Switches
Fan and system settings are controlled by using FAN and SYSTEM switches located on the bottom of the thermostat case.
Owner's Manual - Page 4
...
69-1490
4 Off:
Both heating and cooling are off.
Ht.: (Not available on . SYSTEM Cool Off Heat Em.Ht. Digital display
shows a snowflake when cooling is not working properly. Em. Heat: Normal setting for months when your home
needs heating.
Then set the SYSTEM switch:
Cool: Normal setting for months when your home...
Owner's Manual - Page 5
...; indicator points to Em Ht when the SYSTEM switch is set at Em Ht. The ▲ indicator points to Aux Ht when the living space needs auxiliary backup heat to help handle the heating load.
Owner's Manual - Page 6
Set
Room
INDICATOR
M18441
69-1490
6
To display the temperature setting on the digital display. The ▼ indicator points to Set when the temperature setting is displayed and to 37°C). Displaying Temperature Setting
NOTE: Your temperature setting can be set anywhere from 40° to 99°F (5° to Room when the room temperature is...
Owner's Manual - Page 7
... temperature setting, press the ▲ key. When in the heating mode, lowering the temperature at night or during the day can lower your energy costs. Changing Temperature Setting
1. When in the cooling mode, raising the temperature before you leave for work or school also lowers your energy costs. Set
Room
M18442...
Owner's Manual - Page 8
... the temperature setting during the day. You can save energy with this thermostat, temperature settings can be conveniently programmed to 33% depending on your home, where you live, the number of energy saving periods you choose and your thermostat to automatically change the temperature setting, you might want to 10°F (5°C) at...
Owner's Manual - Page 9
... 18% 19 TO 22% 23 TO 33%
COOL
* YOUR SAVINGS DEPENDS ON HOME SIZE AND ACTUAL HEAT LOSS OR GAIN, GEOGRAPHIC LOCATION, FREQUENCY OF TEMPERATURES CHANGE, AND RANGE IN DEGREES OF...
Owner's Manual - Page 10
... the temperature by pressing either the ▲ or ▼ key.
69-1490
10 See equipment manufacturer instructions. Heating or cooling does not come on the thermostat is below 50°F (10°C).
Owner's Manual - Page 11
For service, contact your local heating and cooling contractor:
11
69-1490
If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502, Monday-Friday, 7:00 am-5:30 pm, Central time.
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