User Guide Non-Programmable Thermostat
The screen will wake up by pressing any of the three buttons. If powered by the C wire, the screen stays lit for 45 seconds after you complete changes. If powered by battery only, the screen stays lit for 8 seconds. Depending on how your thermostat was installed, the screen light may always be on.
1 Press the Menu to cause the Mode and Fan menus to appear.
2 Press Mode 
to cycle through the available modes.
NOTE: Available System modes vary by model and system settings.
System modes:
‒ Heat
‒ Cool
‒ Off
1 Press Menu to cause the Mode and Fan menus to appear.
2 Press Fan 
to cycle through Fan modes.
NOTE: Available Fan modes vary with system settings.
Fan modes:
‒ Auto: Fan runs only when the heating or cooling system is on.
‒ On: Fan is always on.
1 Press and hold Menu (center) for approximately 3 seconds to enter advanced menu.
2 Change setup option 125 by pressing Edit to change the value: 0 = Fahrenheit, 1 = Celsius.
3 Press Done to Save and return to the main menu screen.
Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to wait for a few minutes before restarting.
During the wait time, the display will flash the message Cool On (or Heat On if you have a heat pump). When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
Message flashes until safe restart time has elapsed.
Batteries are optional (to provide backup power) if your thermostat was wired to run on AC power when installed. If your thermostat was not wired to run on AC power, then batteries are required.
Install fresh batteries immediately when the low battery icon appears. The icon appears about two months before the batteries are depleted.
Even if the low battery icon does not appear, you should replace batteries once a year, or before leaving home for more than a month.
NOTE: When replacing batteries, alkaline batteries are recommended.
When the low battery warning appears, press gently to loosen the thermostat and then carefully pull it from the wall mount.
Insert fresh alkaline AA batteries and reinstall thermostat.
Electrical Ratings
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily
Display is blank
Heating or cooling system does not respond
Temperature settings do not change
“Cool On” or “Heat On” is flashing
NOTE: If Optional Cover Plate is not required, see “UWP Mounting System installation” on next page. Use the Optional Cover Plate when you need to cover paint gap from old thermostat. There are different cover plates depending on when the thermostat was manufactured.
For the square cover plate:
1. Separate the Cover Plate from Mounting Plate.
2. Mount the Mounting Plate on to the wall using any of the 8 screw holes. Insert and tighten mounting screws supplied with Cover Plate Kit. Do not overtighten. See Figure 2. Make sure the Mounting Plate is level.
3. Attach the UWP by hanging it on the top hook of the Mounting Plate and then snapping the bottom of the UWP in place. See Figure 3.
4. Snap the Cover Plate onto the Mounting Plate. See Figure 4.
For the rectangular cover plate:
1. Mount the Cover Plate on the wall using any of the 6 screw holes. Insert and tighten the mounting screws supplied with the Cover Plate. Do not overtighten. See Figure 1. Make sure the Cover Plate is level. Attach the UWP by hanging it on the top hook of the Cover Plate and then snapping the bottom of the UWP in place. See Figure 2.
2. If there are no existing wall anchors:
•If your box contains red anchors, drill 7/32” (5.6 mm) holes.
•If your box contains yellow anchors, drill 3/16” (4.8 mm) holes. •Use 2x supplied screws (#8 1-1/2” (38 mm) for red anchors and #6 1-1/2” (38 mm) for yellow anchors).
1. Before starting, turn the power off at the breaker box or switch. Open package to find the UWP. See Figure 1.
2. Position the UWP on wall. Level and mark hole positions. See Figure 2. Drill holes at marked positions, and then lightly tap supplied wall anchors into the wall using a hammer.
‒ If your box contains red anchors, drill 7/32” holes.
‒ If your box contains yellow anchors, drill 3/16” holes.
3. Pull the door open and insert the wires through wiring hole of the UWP. See Figure 3.
4. Place the UWP over the wall anchors. Insert and tighten mounting screws supplied with the UWP. Do not overtighten. Tighten until the UWP no longer moves. Close the door. See Figure 4.
Use 3x supplied screws (#8 1-1/2 for red anchors and #6 1-1/2 for yellow anchors)
Insert R and C wires into designated terminals for primary AC power (C terminal is optional if batteries are installed, but it is recommended). Remove wires by depressing the terminal tabs.
Insert AA batteries for primary or backup power.
Set R Slider Tab.
NOTE: Slider Tabs for U terminals should be left in place for T1 Pro models.
* Terminal can be jumped using Slider Tab. See “Setting Slider Tabs” above.
Note: Not all terminals may be used, depending on the system type that is being wired. The most commonly used terminals are shaded.
1. Push excess wire back into the wall opening.
2. Close the UWP door. It should remain closed without bulging.
3. Align the UWP with the thermostat, and push gently until the thermostat snaps in place.
4. Turn the power on at the breaker box or switch.
1 Press and hold Menu (center) for approximately 3 seconds to enter menu.
2 Press Edit to change values within a setup option.
3 Press Next to advance to the next setup option.
4 Press Done to Save and return to the main menu screen.
NOTE: To keep the factory default settings, press
to advance through the setup options. Once you pass the last option, the thermostat will automatically save and return you to the main menu.
NOTE: A complete list of all setup (ISU) parameters and options starts below and continues through page 7.
NOTE: Depending on system settings, not all options may be available
125 Temperature Indication
200 Heating System Type
Note: This option selects the basic system type your thermostat will control.
205 Heating Equipment Type
Conventional Forced Air Heat:
Heat Pump:
Radiant Heat:
Note: This option selects the equipment type your thermostat will control.
Note: This feature is NOT displayed if feature 200 is set to Cool Only
218 Reversing Valve O/B
Note: This option is only displayed if the Heat Pump configured. Select whether reversing valve O/B should energize in cool or in heat.
220 Cool Stages / Compressor Stages 200=Conv / 200=HP
Note: Select how many Cool or Compressor stages of your equipment the thermostat will control. Set value to 0 if you do not have Cool Stage/ Compressor Stage. This ISU will not be shown on TH1010D model.
221 Heat Stages
Note: Select how many Heat stages of your equipment the thermostat will control. This ISU will not be shown on TH1010D model.
230 Fan Control in Heat
Note: This ISU is only displayed if ISU 205 is set to Electric Forced Air or Fan Coil.
430 Minimum Cool Setpoint
Note: The cool temperature cannot be set below this level. This ISU will not be shown on TH1010D model unless ISU 200 is set to 5 (cool only).
431 Maximum Heat Setpoint
Note: The heat temperature cannot be set above this level. This ISU will not be shown on TH1010D model unless ISU 200 is not set to 5 (cool only).
1400 Backlighting
Note: Common wire needed for continuous. This ISU will not be shown if the device is powered only by battery.
1420 Temperature Display Offset
Note: 0 °F - No difference in displayed temperature and the actual room temperature. The thermostat can display up to 3 °F (1.5 C) lower or higher than the actual measured temperature.
Reference file: Honeywell TH1110D2009/U T1 Non-Programmable Thermostat
Series: T Series
Additionally, the document applies to other Honeywell models: TH1110D2009, TH1010D2000
