Honeywell T8400C Support Question
Honeywell T8400C Support Question
Find answers below for this question about Honeywell T8400C.Need a Honeywell T8400C manual? We have 2 online manuals for this item!
Question posted by panasa53 on June 19th, 2011
Model T8400c 1016
The screen on my thermostat went blank. Does it have to be replaced or can it be repaired?
Current Answers
Related Honeywell T8400C 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
... a glance.
• No need for you with a more comfortable and convenient living environment.
• Simple and easy to change your new thermostat! Over 100 years of Honeywell engineering expertise went into the making of your temperature setting.
• Large digital display. The ▲ and ▼ keys make it easy for batteries. Congratulations...
Owner's Manual - Page 3
... on . 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
...:
Cool: Normal setting for months when your
equipment has failed or is not working properly. Em.
Digital display shows a flame
when heating is on all models.) Switch to this
setting when your home needs heat, but your home
needs heating. Off:
Both heating and cooling are off. SYSTEM Cool Off Heat...
Owner's Manual - Page 5
... Ht
Set
Room
M18425
5
69-1490
The ▲ indicator points to either Em Ht or Aux Ht when these modes are not available on all models.
Owner's Manual - Page 8
... 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 leave for work or school. With this thermostat in the cooling mode by lowering the temperature setting 5°F (3°C) to 10°F (5°C) at night and...
Owner's Manual - Page 10
...• Check that the SYSTEM switch on .
Heating or cooling does not come on the thermostat is below 50°F (10°C). Troubleshooting Guide
CAUTION
To avoid possible equipment damage, do not... temperature is set to Heat or Cool.
• Check the system fuse or circuit breaker and replace or reset if necessary.
• Check for air movement at the register.
• Check power...
Owner's Manual - Page 11
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. For service, contact your local heating and cooling contractor:
11
69-1490
Installation Instructions - Page 1
.... The T8400C SUPER TRADELINE® model also includes two decorator cover plates for wiring and mounting thermostat) and owner's guide. Failure to cool. This thermostat is powered directly from ducts. - MERCURY NOTICE
If this Product...
1. Can shock individuals or short equipment circuitry. CAUTION
Electrical Shock or Equipment Damage Hazard. Cooling cycle rate is replacing a control...
Installation Instructions - Page 2
... the wall using the anchors and screws provided.
5. Mount decorator cover plate (SUPER TRADELINE® model only), wallplate, T8400C or T8401C, and the screws provided (see Wiring section. The shape of the terminals permits insertion of thermostat. The T8400C Thermostat is acceptable. All wiring must comply with local electrical codes and ordinances. NOTE: To ensure...
Installation Instructions - Page 3
... fan runs continuously. Auto: Normal setting for improved air circulation and air quality. See Fig. 7. M11232
T8400C, T8401C W Y G R
2C
1
L1
(HOT)
24V
L2
COOLING CONTACTOR
HEATING PRIMARY CONTROL
FAN RELAY
1 POWER SUPPLY. T8400C AND T8401C ELECTRONIC THERMOSTATS
KEEP WIRING IN SHADED AREA
ALTERNATE MOUNTING SCREW HOLE
W
Y G
R C
MOUNTING SCREW HOLE
ALTERNATE MOUNTING SCREW HOLE...
Installation Instructions - Page 4
...or Cool by sliding the SYSTEM switch in the lower right corner of the thermostat to Room when the room temperature is displayed in °F, set the ...thermostat controls the cooling system. T8400C AND T8401C ELECTRONIC THERMOSTATS
Slide the FAN switch in the bottom left corner of the thermostat to change the setpoint several degrees.
SYSTEM Switch
System switch settings control thermostat...
Installation Instructions - Page 5
A typical example is shown, but CC varies by model. T8400C AND T8401C ELECTRONIC THERMOSTATS
10. Press the s key to save all equipment responds ...setup mode and return to the desired room temperature. Press the s key again to the thermostat. Fan
1. When using an electric heat thermostat, the fan starts immediately.
3. Press the t key to equipment manufacturer's instructions. M14690
...
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