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 craigt777 on May 30th, 2018
Thermostat Not Turning On Ac At Set Temp
The thermostat is set at 70 and the room temp reads 81 on the thermostat. Will not turn on the AC even when adjusted. Any ideas.
Current Answers
Related Honeywell T8401C1015 Manual Pages
Installation Instructions - Page 1
...with manual changeover from affecting the thermostat; Cooling cycle rate is a precision instrument and was carefully adjusted at 3 cph.
Check the ...thermostat. radiant heat from ducts. - see Fig. 2) as follows:
1. T8400C, T8401C Electronic Thermostats
INSTALLATION INSTRUCTIONS
The T8400C and T8401C Thermostats provide singlestage, non-programmable temperature control for 24V heating...
Installation Instructions - Page 2
...through 10 for most systems. If this system is an electric heat system, set the switch to the shaded area. E F
FAN OPERATION (FUEL) SWITCH
M12580
Fig....-gauge maximum wire to turn on immediately with local electrical codes and ordinances. either method is the correct setting for typical wiring hookups. Typical location of thermostat. T8400C, T8401C ELECTRONIC THERMOSTATS
YES NO
NO 5 ...
Installation Instructions - Page 3
... CHANGEOVER
B
2 COOL
O
CHANGEOVER
1
L1
(HOT)
24V
L2
TRANSFORMER
COMPRESSOR
FAN RELAY
1 POWER SUPPLY.
Typical hookup of T8400C in single-stage heat pump systems.
3
69-1740 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.
Restrict wiring to shaded area (T8400C...
Installation Instructions - Page 4
...
Fig. 11. FAN Switch
Fan switch settings are controlled manually by the heating equipment and may start a few minutes after the heating equipment turns on (on most homes. In heating, the fan is controlled directly by using an electric heat thermostat, the fan starts and stops with the cooling equipment. M20881
Fig. 9. Set Room
AuFtAoNOn
CooSlYOSfTf EHMeat
B PRESS LOWER...
Installation Instructions - Page 5
... lower right corner of the thermostat to select the desired system setting. M14682
Set Room
AuFtAoNOn
FAN SWITCH
CoSoYl SOTffEMHeat
M14678A
Fig. 12.
If the temperature is 40° to 99°F (5° to 37°C). M14684
System setting at HEAT: If heat is off, ▼ turns it off ; SYSTEM Switch
System switch settings control thermostat operation as the indicator...
Installation Instructions - Page 6
...After approximately ten seconds, the heating equipment should start . In conventional systems, the system turns on initial startup, the T8400C and T8401C Thermostats go into a five-minute delay... ELECTRONIC THERMOSTATS
NOTE:
In installer setup mode only, each press of a time delay relay or through a limit control. M14688
5. C3 = Aggressive heating/cooling temperature control (can cause room ...
Installation Instructions - Page 7
... to raise the temperature setting above the room temperature. Press the ▲ key to the thermostat.
7
69-1740
T8400C, T8401C ELECTRONIC THERMOSTATS
Fan
1. Slide the SYSTEM switch to Off and the FAN switch to Auto. In heating, the fan is controlled directly by the heating equipment and may start a few minutes after the heating equipment turns on (on most...
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