PRO 4000 5-2 Day Programmable Thermostat

: June 7, 2024
: Honeywell

Table of Contents

How do I remove the schedule on the TH4210D, TH4110D, TH4110B thermostat?
How do I adjust the screen brightness on my TH4210D, TH4110D, TH4110B
How do I bypass the schedule on the TH4210D, TH4110D, TH4110B thermostat?
How do I program the schedule on a TH4210D, TH4110D, TH4110B thermostat?
How do I lock the screen TH4210D, TH4110D, TH4110B thermostat?
How do I enable auto change over on the TH4210D, TH4110D, TH4110B?
How do I access the installer setup (ISU) on my TH4210D, TH4110D, TH4110B
How do I change between heating and cooling on the TH4210D, TH4110D,
Is the TH4210D, TH4110D, TH4110B heat pump compatible?
How do I enable auto change over on the TH4210D, TH4110D, TH4110B?
How do I access the installer setup (ISU) on my TH4210D, TH4110D, TH4110B
How do I change between heating and cooling on the TH4210D, TH4110D,
How do I remove the schedule on the TH4210D, TH4110D, TH4110B thermostat?
How do I adjust the screen brightness on my TH4210D, TH4110D, TH4110B
How do I bypass the schedule on the TH4210D, TH4110D, TH4110B thermostat?
How do I fix a blank display on my TH4210D, TH4110D, TH4110B thermostat?
How do I enable auto change over on the TH4210D, TH4110D, TH4110B?
How do I program the schedule on a TH4210D, TH4110D, TH4110B thermostat?
How do I lock the screen TH4210D, TH4110D, TH4110B thermostat?
How do I change between heating and cooling on the TH4210D, TH4110D,
How do I fix a blank display on my TH4210D, TH4110D, TH4110B thermostat?
Why is my TH4210D, TH4110D, TH4110B showing an error message Replace Batt?
Specifications
Downloads
Read User Manual Online (PDF format)
Download This Manual (PDF format)

TH4110D1007/U
TH4210D1005/U

Installation Guide [pdf]: PROTH4110B Programmable Thermostat

Installation Instructions [pdf]: PRO TH4000 Series

How do I remove the schedule on the TH4210D, TH4110D, TH4110B thermostat?

Press up or down to immediately adjust the temperature and then press the HOLD button. The thermostat will hold this temperature until the HOLD button is pressed again.

How do I adjust the screen brightness on my TH4210D, TH4110D, TH4110B

thermostat?

Pressing any button will cause the screen to light up for a period of time and will dim over time if no additional buttons are pressed.

How do I bypass the schedule on the TH4210D, TH4110D, TH4110B thermostat?

Press up or down to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period. “Temporary” will appear on the display. The new temperature will be used until the next period begins.

To permanently ignore the schedule, press up or down until the desired temperature is displayed. Then, press the Hold button to maintain the new temperature indefinitely. The word Hold will appear on the screen.

Press the Run button if you wish to cancel either override and resume the schedule. The word Hold will disappear and the thermostat will be set to the temperature programmed for the current period.

How do I program the schedule on a TH4210D, TH4110D, TH4110B thermostat?

Make sure the thermostat is set to the system you want to program (Heat or Cool).

Press SET until Set Schedule is displayed.
Press up or down to set your weekday Wake time (Mon-Fri), then press SET.
Press up or down to set the temperature for this time period, then press SET.
Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each weekday time period.
Press SET to set weekend time periods (Sat-Sun), then press RUN to save & exit.

To cancel an unwanted time period (except Wake), press and hold up + HOLD for 4 seconds while in the Set Schedule mode.

How do I lock the screen TH4210D, TH4110D, TH4110B thermostat?

The TH4210D, TH4110D, TH4110B does not support a screen lock feature.

How do I enable auto change over on the TH4210D, TH4110D, TH4110B?

The TH4210D, TH4110D, TH4110B does not have an automatic change over feature. Select Heating, off, or cooling with the selector switch to choose the mode you desire.

How do I access the installer setup (ISU) on my TH4210D, TH4110D, TH4110B

thermostat?

Instructions:

To begin, press and hold the up and down buttons until the display changes.
Press down to change settings.
Press up to advance to next function.
Press and hold down and up to exit and save settings.

For more information on the ISU, please see pages 5 and 6 in the manual.

Installation Instructions [pdf]: PRO TH4000 Series

How do I change between heating and cooling on the TH4210D, TH4110D,

TH4110B?

Locate the selector switch on the bottom of the thermostat labeled Heating, off, Cooling. Move the selector switch to the desired mode.

Is the TH4210D, TH4110D, TH4110B heat pump compatible?

Yes. The TH4210D, TH4110D, TH4110B will work with a heat pump. The TH4210D will also work with a heat pump with backup.

How do I enable auto change over on the TH4210D, TH4110D, TH4110B?

The TH4210D, TH4110D, TH4110B does not have an automatic change over feature. Select Heating, off, or cooling with the selector switch to choose the mode you desire.

How do I access the installer setup (ISU) on my TH4210D, TH4110D, TH4110B

thermostat?

Instructions:

To begin, press and hold the up and down buttons until the display changes.
Press down to change settings.
Press up to advance to next function.
Press and hold down and up to exit and save settings.

For more information on the ISU, please see pages 5 and 6 in the manual. Click here to download (English)

How do I change between heating and cooling on the TH4210D, TH4110D,

TH4110B?

Locate the selector switch on the bottom of the thermostat labeled Heating, off, Cooling. Move the selector switch to the desired mode.

How do I remove the schedule on the TH4210D, TH4110D, TH4110B thermostat?

Press up or down to immediately adjust the temperature and then press the HOLD button. The thermostat will hold this temperature until the HOLD button is pressed again.

How do I adjust the screen brightness on my TH4210D, TH4110D, TH4110B

thermostat?

Pressing any button will cause the screen to light up for a period of time and will dim over time if no additional buttons are pressed.

How do I bypass the schedule on the TH4210D, TH4110D, TH4110B thermostat?

Press up or down to immediately adjust the temperature. This will temporarily override the temperature setting for the current time period. “Temporary” will appear on the display. The new temperature will be used until the next period begins.

To permanently ignore the schedule, press up or down until the desired temperature is displayed. Then, press the Hold button to maintain the new temperature indefinitely. The word Hold will appear on the screen.

Press the Run button if you wish to cancel either override and resume the schedule. The word Hold will disappear and the thermostat will be set to the temperature programmed for the current period.

How do I fix a blank display on my TH4210D, TH4110D, TH4110B thermostat?

If the thermostat is battery powered, check/replace your batteries. If the device is common wired, try and power it up with batteries. If that fails to power up the thermostat, you may need to involve a technician. If batteries do power up your common wired thermostat, check your breakers, furnace power switch, furnace door kill switch to insure your system is powered. If your system is fine, and the thermostat only works on batteries, you may need to involve a technician.

How do I enable auto change over on the TH4210D, TH4110D, TH4110B?

The TH4210D, TH4110D, TH4110B does not have an automatic change over feature. Select Heating, off, or cooling with the selector switch to choose the mode you desire.

How do I program the schedule on a TH4210D, TH4110D, TH4110B thermostat?

Make sure the thermostat is set to the system you want to program (Heat or Cool).

Press SET until Set Schedule is displayed.
Press up or down to set your weekday Wake time (Mon-Fri), then press SET.
Press up or down to set the temperature for this time period, then press SET.
Set time and temperature for the next time period (Leave). Repeat steps 2 and 3 for each weekday time period.
Press SET to set weekend time periods (Sat-Sun), then press RUN to save & exit.

To cancel an unwanted time period (except Wake), press and hold up + HOLD for 4 seconds while in the Set Schedule mode.

How do I lock the screen TH4210D, TH4110D, TH4110B thermostat?

The TH4210D, TH4110D, TH4110B does not support a screen lock feature.

How do I change between heating and cooling on the TH4210D, TH4110D,

TH4110B?

Locate the selector switch on the bottom of the thermostat labeled Heating, off, Cooling. Move the selector switch to the desired mode.

How do I fix a blank display on my TH4210D, TH4110D, TH4110B thermostat?

If the thermostat is battery powered, check/replace your batteries. If the device is common wired, try and power it up with batteries. If that fails to power up the thermostat, you may need to involve a technician. If batteries do power up your common wired thermostat, check your breakers, furnace power switch, furnace door kill switch to insure your system is powered. If your system is fine, and the thermostat only works on batteries, you may need to involve a technician.