Honeywell’s TL8230A programmable thermostat can be connected to an
electric heater to control the room temperature.
*Set the switch to Off to cut power to the heater. This will not affect the time and tem-
**The thermostat displays the heater duty cycle required to maintain the desired tem-
perature. For example, appears when the heater is activated 40 percent of the
•To remove the control module from the power
base, loosen the captive screw underneath the
thermostat and pull the two components apart
•To install the control module onto the power
base, reverse the above procedure.
NOTE: Always keep the thermostat's vents clean and
Some thermostat configurations can be
modified via the switches on the back of the
Default (factory) settings are inside the gray cells.
Upon power-up, the thermostat is in manual mode () and displays the
nPress the Hour and Min buttons to set the time.
oPress the Day button to set the day.
LO:The measured temperature is below 32°F (0°C).
Heating is activated.
HI:The measured temperature is above 122°F (50°C).
When the backlight button is pressed, the display illuminates for 5 seconds.
When either of the buttons is pressed, the display illuminates for 10 sec-
The thermostat generally displays the actual temperature. To view the
setpoint, press one of the buttons once or press the backlight button. The
setpoint will appear for the next 5 seconds.
To change the setpoint, press one of the buttons until the desired temper-
ature is displayed. To scroll faster, hold the button.
The thermostat has 3 temperature preset buttons:
Comfort preset button
Economy preset button
Vacation preset button
To use a preset temperature, press the appropriate button. The corresponding
icon , or will be displayed.
The following table shows the intended use and the default setting of each of
the preset buttons.
To store a preset temperature:
nSet the desired temperature using the buttons.
oPress and hold the appropriate preset button until the corresponding
icon is displayed.
pPress Mode/Ret to exit.
% of duty cycle1 to 24%25 to 49%50 to 74%75 to 99%100%
a.If you change the temperature display format, the preset buttons (, and )
will return to their default settings.
b.Early Start functions in Automatic mode only. When this function is enabled, the
thermostat calculates the optimal time to start heating in order to obtain the desired
temperature by the set time. The thermostat re-assesses the start time daily based
on the previous day’s performance.
On/Off switch *
Day and time
Mode selection /
Time and day display
Heating power **
the setpoint is
IconIntended useDefault settingNew
(when at home)
(when asleep or away from home)
(during prolonged absence)
Number of questions: 0
Do you have a question about the Honeywell TL8230A or do you need help? Ask your question here. Provide a clear and comprehensive description of the issue and your question. The more detail you provide for your issue and question, the easier it will be for other Honeywell TL8230A owners to properly answer your question.
About the Honeywell TL8230A
View the manual for the Honeywell TL8230A here, for free. This manual comes under the category Thermostat and has been rated by 1 people with an average of a 5.1. This manual is available in the following languages: English. Do you have a question about the Honeywell TL8230A or do you need help? Ask your question here