PRO 2000 Series Programmable Thermostat

Honeywell Home PRO 2000 Series Programmable Thermostat

The Honeywell Home PRO 2000 Series is a programmable thermostat designed to control compatible residential heating and cooling systems. It uses a digital display, push-button temperature controls, system and fan switches, and programmable temperature schedules.

The thermostat provides direct control of heating and cooling temperatures through its Up and Down buttons. The SET, HOLD, and RUN buttons allow users to configure the clock, program temperature schedules, temporarily change settings, or maintain a selected temperature.

The PRO 2000 Series includes two models:

• TH2110DV: Designed for heating and cooling systems with one heating stage and one cooling stage (1 Heat/1 Cool).
• TH2210DV: Designed specifically for heat pump systems with two heating stages and one cooling stage (2 Heat/1 Cool).

The thermostat displays the measured room temperature during normal operation. It also shows the current time and day, scheduled operating period, system status, and low-battery warnings.

The heating and cooling schedule includes four daily periods: Wake, Leave, Return, and Sleep. Different times and temperatures can be configured for weekdays and weekends.

The thermostat also provides temporary and permanent temperature overrides, allowing manual changes without modifying the stored schedule.

Product Features

Technical Specifications

TH2110DV and TH2210DV Model Differences

The TH2210DV supports emergency and auxiliary heating functions when used with a compatible heat pump system.

Thermostat Parts and Components

The PRO 2000 Series has a digital display, push-button controls, system switch, fan switch, and removable body mounted on a wallplate.

Main Components

Thermostat Control Layout

The thermostat has three programming buttons:

• SET
• HOLD
• RUN

The Up and Down temperature adjustment buttons are positioned separately from the programming buttons.

The FAN and SYSTEM switches are located on the side of the thermostat.

Wallplate and Battery Compartment

The thermostat can be removed from its wallplate to access the batteries.

The battery compartment is located on the rear of the thermostat.

Button and Control Functions

SET Button

The SET button is used to configure the thermostat’s time, day, and programmed temperature schedule.

Pressing SET moves through the available setting screens.

HOLD Button

The HOLD button overrides the programmed temperature schedule.

It allows the thermostat to maintain a selected temperature until the setting is manually changed or the RUN button is pressed.

RUN Button

The RUN button returns the thermostat to its programmed schedule.

It also saves changes when setting the clock and schedule.

Up and Down Buttons

The ▲ and ▼ buttons are used to:

• Increase or decrease the desired temperature.
• Set the clock.
• Choose the day of the week.
• Set program start times.
• Adjust scheduled temperatures.

Thermostat Display Guide

The digital display shows the current operating information and selected temperature settings.

Display Indicators and Messages

Room Temperature Display

During normal operation, the thermostat displays the measured indoor temperature.

Viewing the Setpoint Temperature

To check the selected temperature:

1. Press the ▲ or ▼ button once.
2. The thermostat displays the setpoint temperature.
3. The Set indicator appears.
4. The setpoint remains visible for approximately five seconds.
5. The display returns to the measured room temperature.

Display Backlight

Pressing any button illuminates the display for approximately 12 seconds.

Important Safety Instructions

Compressor Damage Warning

CAUTION: EQUIPMENT DAMAGE HAZARD

To prevent possible compressor damage, do not operate the cooling system when the outdoor temperature is below 50°F (10°C).

This warning applies when selecting and operating the cooling mode.

Selecting the Correct Operating Mode

The SYSTEM switch must be positioned according to the required heating or cooling operation.

• Heat controls the heating system.
• Cool controls the cooling system.
• Off turns off heating and cooling.
• Em Heat controls emergency and auxiliary heating on supported systems.

Emergency Heat Precaution

On compatible heat pump systems, selecting Em Heat locks out the compressor.

This mode should only be used with a supported heating system configuration.

Before First Use

The PRO 2000 Series uses a programmable clock and temperature schedule.

Before beginning normal operation:

1. Set the current time.
2. Set the correct day of the week.
3. Select the required heating or cooling mode.
4. Select the fan setting.
5. Review or configure the temperature schedule.

The clock and day must be set correctly for scheduled changes to occur at the intended times.

Setting the Time and Day

The thermostat uses the current time and day to determine the correct programmed temperature period.

How to Set the Clock

1. Press SET.
2. The display shows Set Time.
3. Press ▲ or ▼ to adjust the clock.
4. Continue until the correct time appears.

How to Set the Day of the Week

1. Press SET again.
2. The display shows Set Day.
3. Press ▲ or ▼ to select the current day.
4. Press RUN to save the changes and exit.

If the Clock Is Flashing

When the clock flashes, the thermostat follows the settings for the Monday Wake period until the time and day are configured again.

To restore correct scheduling, reset the clock and day using SET, then press RUN.

Selecting the Heating or Cooling System

The SYSTEM switch determines which heating or cooling function the thermostat controls.

SYSTEM Switch Settings

How to Select Heating Mode

1. Move the SYSTEM switch to Heat.
2. Press ▲ or ▼ to select the desired temperature.
3. The thermostat controls the heating system according to the selected temperature and current operating conditions.

The display shows Heat On when heating operates.

How to Select Cooling Mode

1. Move the SYSTEM switch to Cool.
2. Press ▲ or ▼ to select the desired temperature.
3. The thermostat controls the cooling system according to the selected settings.

The display shows Cool On when cooling operates.

Do not operate cooling when the outdoor temperature is below 50°F (10°C).

How to Turn Off Heating and Cooling

Move the SYSTEM switch to Off.

The thermostat turns off heating and cooling control.

Emergency Heat Mode

The Em Heat position is intended for compatible heat pump systems.

When selected:

• Emergency and auxiliary heating are controlled.
• The compressor is locked out.

This function applies only to supported thermostat and HVAC system configurations.

Selecting the Fan Setting

The FAN switch controls how the system fan operates.

Fan Modes

Auto Fan Mode

Move the FAN switch to Auto.

The fan operates when the heating or cooling system runs.

Continuous Fan Mode

Move the FAN switch to On.

The fan continues running instead of operating only during heating or cooling cycles.

Understanding the Program Schedule

The PRO 2000 thermostat uses four daily schedule periods.

These periods allow different temperatures to be selected according to household activity.

Daily Program Periods

Wake

The Wake period controls the desired temperature during the morning.

Leave

The Leave period controls the temperature while occupants are away from home.

Return

The Return period controls the temperature during the evening.

Sleep

The Sleep period controls the overnight temperature.

Weekday and Weekend Programming

The thermostat separates programming into:

• Weekdays: Monday through Friday (Mo–Fr)
• Weekends: Saturday and Sunday (Sa–Su)

Different start times and temperatures can be assigned to the two groups.

How to Program the Thermostat Schedule

The thermostat allows the start time and temperature for each programmed period to be changed.

Before Programming

Make sure the SYSTEM switch is set to the mode being programmed.

Select Heat to configure heating temperatures or Cool to configure cooling temperatures.

Programming the Weekday Schedule

1. Press SET until Set Schedule appears on the display.
2. The thermostat opens the weekday Wake period.
3. Press ▲ or ▼ to set the Wake start time for Monday through Friday.
4. Press SET.
5. Press ▲ or ▼ to set the desired temperature for Wake.
6. Press SET to move to the Leave period.
7. Set the Leave time and temperature.
8. Continue through Return and Sleep using the same procedure.

Programming the Weekend Schedule

After the weekday periods have been configured:

1. Continue pressing SET to reach the weekend program.
2. Select the desired Wake start time for Saturday and Sunday.
3. Press SET to move to the temperature setting.
4. Adjust the Wake temperature.
5. Continue through Leave, Return, and Sleep.
6. Press RUN to save the schedule and exit.

Programming Heating and Cooling Separately

Heating and cooling settings should be configured while the thermostat is in the corresponding operating mode.

For a heating schedule, move SYSTEM to Heat before programming.

For a cooling schedule, move SYSTEM to Cool before programming.

Saving the Schedule

Press RUN after completing the schedule settings.

The thermostat exits programming and resumes normal operation.

Temporarily Changing the Temperature

A temporary override allows the selected temperature to be changed without permanently altering the stored schedule.

How to Set a Temporary Override

1. Make sure the SYSTEM switch is set to Heat or Cool.
2. Press ▲ or ▼ to select a different temperature.
3. The display shows Temporary.
4. The current program period begins flashing.

The thermostat maintains the manually selected temperature until the next scheduled period begins.

Example of a Temporary Override

If the thermostat is operating in the Wake period, the selected temperature can be adjusted using the Up or Down button.

The thermostat follows the manually selected temperature for the remainder of Wake.

When the next programmed period begins, the thermostat resumes the stored schedule.

How to Cancel a Temporary Override

Press RUN.

The thermostat cancels the temporary temperature setting and returns to the programmed schedule.

Permanently Holding a Temperature

The HOLD function allows the thermostat to maintain a manually selected temperature instead of following the programmed schedule.

How to Activate Permanent Hold

1. Make sure the SYSTEM switch is set to the desired heating or cooling mode.
2. Press HOLD.
3. Use ▲ or ▼ to set the required temperature.
4. The display shows Hold.

The thermostat stops following the normal program schedule.

How Long Does Hold Remain Active?

The selected temperature is maintained continuously, 24 hours a day, until it is changed manually or Hold is cancelled.

How to Cancel Hold

Press RUN.

The thermostat cancels the permanent temperature override and resumes scheduled operation.

Temporary Override vs. Permanent Hold

Compressor Protection Indicator

The PRO 2000 thermostat includes a compressor protection function.

The display indicates when compressor protection is engaged.

Flashing Cool On

When Cool On flashes, compressor protection is active.

The display indicates that the cooling system is under compressor protection rather than ordinary cooling operation.

Flashing Heat On

On supported heat pump systems, Heat On may flash when compressor protection is active.

System Status Indicators

Battery Replacement

The thermostat uses two AAA alkaline batteries.

Low-Battery Warning

When the batteries are approaching depletion, Lo Batt flashes on the display.

The warning appears approximately 60 days before the batteries are completely depleted.

When to Replace Batteries

The batteries should be replaced:

• When Lo Batt begins flashing.
• Once each year.
• Before leaving home for more than one month.

How to Replace the Batteries

1. Hold the thermostat securely.
2. Pull gently from the bottom to remove it from the wallplate.
3. Turn the thermostat over.
4. Remove the existing batteries.
5. Insert two fresh AAA alkaline batteries according to the polarity markings.
6. Reinstall the thermostat on the wallplate.
7. Reset the time and day if necessary.

Are the Settings Lost After Battery Replacement?

Most thermostat settings are stored in nonvolatile memory.

The stored programming settings are retained after the batteries are replaced.

Only the clock and day must be set again.

Troubleshooting Guide

The following checks explain the thermostat’s displayed operating states and the relevant adjustments.

Common Problems and Solutions

Thermostat Clock Keeps Flashing

A flashing clock means the thermostat requires the time and day to be set.

1. Press SET.
2. Adjust the time using ▲ or ▼.
3. Press SET again.
4. Select the correct day.
5. Press RUN.

Thermostat Does Not Follow the Expected Schedule

Check that:

1. The time and day are correct.
2. The thermostat is using the required Heat or Cool mode.
3. The program has been saved using RUN.
4. Permanent Hold is not active.

Press RUN to return to the programmed schedule.

Thermostat Is Stuck on Hold

The Hold setting maintains the manually selected temperature continuously.

Press RUN to cancel Hold and resume the programmed schedule.

Thermostat Changes Temperature Automatically

A temporary temperature override ends when the next scheduled program period begins.

For a temperature that remains active continuously, use HOLD.

Fan Runs Continuously

Check the FAN switch.

If it is set to On, the fan operates continuously.

Move the switch to Auto to run the fan only when the heating or cooling system operates.

Cool On or Heat On Is Flashing

Flashing Cool On or Heat On indicates that compressor protection is active.

The flashing message identifies the protection state.

Thermostat Displays Lo Batt

The batteries are approaching depletion.

Replace both AAA alkaline batteries with fresh ones.

After replacement, reset the time and day.

Display Messages and Indicator Lights

Maintenance and Battery Care

The PRO 2000 Series is maintained through battery replacement and correct operation of its controls.

Routine Battery Maintenance

• Replace the batteries once each year.
• Replace batteries when Lo Batt appears.
• Use two fresh AAA alkaline batteries.
• Reset the clock and day after replacement.
• Replace the batteries before an absence longer than one month.

Checking Thermostat Operation

The thermostat’s normal operating information can be checked using its display and controls.

• The measured room temperature is displayed during normal operation.
• Press ▲ or ▼ once to check the setpoint.
• Use the SYSTEM switch to select heating or cooling.
• Use the FAN switch to select fan operation.
• Use RUN to return to the stored temperature schedule.

Customer Support Information

Honeywell Home thermostat support is provided through the support resources listed for this product.

Frequently Asked Questions

1. How do I set the time on a Honeywell PRO 2000 TH2110DV or TH2210DV thermostat?

Press SET and use the Up or Down button to adjust the clock. Press SET again to choose the correct day of the week, then press RUN to save the settings.

2. How do I program the Honeywell PRO 2000 thermostat?

Move the SYSTEM switch to Heat or Cool, then press SET until Set Schedule appears. Use the Up and Down buttons to configure the Wake time and temperature. Continue through Leave, Return, and Sleep for weekdays and weekends. Press RUN to save the schedule.

3. What does Hold mean on the Honeywell PRO 2000 thermostat?

Hold means the thermostat is maintaining a manually selected temperature continuously rather than following the programmed schedule. Press RUN to cancel Hold and resume scheduled operation.

4. How do I temporarily change the thermostat temperature?

Press the Up or Down button to select a different temperature. Temporary appears on the display, and the thermostat maintains the new setting until the next programmed period begins. Press RUN to cancel the override earlier.

5. What is the difference between Fan Auto and Fan On?

Auto runs the fan only when the heating or cooling system is operating. On runs the fan continuously.

6. Why is Cool On or Heat On flashing?

A flashing Cool On or Heat On message indicates that compressor protection is active. The Heat On message applies to compatible heat pump systems.

7. How do I replace the batteries in the Honeywell PRO 2000 thermostat?

Pull the thermostat gently from the bottom to detach it from the wallplate, turn it over, and replace the two AAA alkaline batteries. Reinstall the thermostat and reset the clock and day.

8. What is the difference between the Honeywell TH2110DV and TH2210DV?

The TH2110DV is designed for conventional 1 Heat/1 Cool systems. The TH2210DV is designed specifically for 2 Heat/1 Cool heat pump systems and supports emergency and auxiliary heating control on compatible equipment.