Honeywell T8401C1015 Support Question
Honeywell T8401C1015 Support Question
Find answers below for this question about Honeywell T8401C1015 - Electronic Thermostat - 1 Heat/1Cool.Need a Honeywell T8401C1015 manual? We have 1 online manual for this item!
Question posted by michelleredfearn on January 6th, 2013
The Screen Is Blank, Then Flashes In And Out, But The Heat Is Working.
The screen is usually blank but then will flash the temp every once in a while. The heat is working. We did turn the temp down to 55 while out of town, and problem started when we returned.
Current Answers
Related Honeywell T8401C1015 Manual Pages
Installation Instructions - Page 1
... Wallplate to Wall
IMPORTANT Level only for operation. T8400C, T8401C Electronic Thermostats
INSTALLATION INSTRUCTIONS
The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating-cooling systems with good air circulation at average temperature. The T8400C Thermostat is suitable for instructions regarding recycling and the proper disposal of...
Installation Instructions - Page 2
... the correct setting for typical wiring hookups. All wiring must comply with the heating or cooling equipment in a system where the G terminal is preset at the factory in the F position. E F
FAN OPERATION (FUEL) SWITCH
M12580
Fig. 3. T8400C, T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 FEET
[1.5 METERS]
NO
M11338
Fig. 1. either method is an electric...
Installation Instructions - Page 3
... systems.
3
69-1740 G
Rc
R
24
W
B Y
O
1
L1 (HOT) L2
FAN RELAY
3
COOL DAMPER
3
HEAT DAMPER
COMPRESSOR CONTACTOR
HEAT RELAY
1 L1 (HOT)
L2
COOLING TRANSFORMER
HEATING TRANSFORMER
1 POWER SUPPLY. T8400C, T8401C ELECTRONIC THERMOSTATS
KEEP WIRING IN SHADED AREA
G
Rc
R
W B
Y O
MOUNTING SCREW HOLE
WIRING ENTRANCE HOLE
MOUNTING SCREW HOLE
M16432
Fig. 4. Wiring connections (T8400C...
Installation Instructions - Page 4
... start a few minutes after the heating equipment turns on (on most homes. Typical hookup of T8401C in heat-cool system. M20882
Fig. 10. Auto: Normal setting for improved air circulation and air quality. In cooling, the fan starts and stops with the heating equipment. In heating, the fan is controlled directly by using an electric heat thermostat, the fan starts...
Installation Instructions - Page 5
...switch in the lower right corner of the thermostat to turn heat or cool outputs on the digital display. INCREASE SETTING DECREASE SETTING
T8400C, T8401C ELECTRONIC THERMOSTATS
3. To increase the temperature setpoint press the...the desired mode. M14680
Setting °F/°C Indication and Heat Cycle Rate
NOTE:
To save changes to Set and flashes.
When the keys are off . If the room ...
Installation Instructions - Page 6
...Gas or oil forced air Electric heat Special applicationsb
Cycles Per Hour 1 3
6 9 4, 5, 12
aHigh efficiency furnace.
In conventional systems, the system turns on initial startup, the T8400C and T8401C Thermostats go into a five-minute delay.
After approximately five minutes, the cooling equipment should stop. T8400C, T8401C ELECTRONIC THERMOSTATS
NOTE:
In installer setup mode only...
Installation Instructions - Page 7
... the heating equipment turns on (on most systems).
Press the ▲ key to Auto. In cooling, the fan starts and stops with the heating equipment. The fan should shut down. Be sure all equipment responds correctly to On. Slide the SYSTEM switch to Off and the FAN switch to the thermostat.
7
69-1740 3. T8400C, T8401C ELECTRONIC THERMOSTATS...
Similar Questions
My Heat Wont Work And My Thermostat Went Blank
(Posted by sajl2 9 years ago)
Why Honeywell T8401c Thermostat Suddenly Quit Working
We have an T8401c thermostat that just suddenly quit working, no ac unit function'
We have an T8401c thermostat that just suddenly quit working, no ac unit function'
(Posted by xmwwang1964 10 years ago)
Honeywell Thermostat Rth230b Heat Won't Turn Off
(Posted by naek 10 years ago)
Thermostat Screen Is Blank And Won't Turn On The Ac Or Heater?
Thermostat screen is blank and does do anything. It does not turn on the ac or the heater?
Thermostat screen is blank and does do anything. It does not turn on the ac or the heater?
(Posted by avandor11 12 years ago)
Heat Only Will Turn On When You Turn The Fan To On
I install a new Honeywell thermostat model TH5220D1003. The A\C works great turn fan to auto turn t...
I install a new Honeywell thermostat model TH5220D1003. The A\C works great turn fan to auto turn t...
(Posted by guyfromunion 14 years ago)