Honeywell TH6110D1005/U Manual: A Comprehensive Guide
Welcome! This guide unlocks the full potential of your Honeywell TH6110D1005/U thermostat, offering detailed instructions for installation, operation, and troubleshooting, ensuring optimal comfort.
Discover how to download the official manual, access Honeywell support, and understand system compatibility for a seamless experience with your programmable digital thermostat.
The Honeywell TH6110D1005/U thermostat, part of the FocusPRO 6000 series, represents a significant step towards enhanced home climate control. This programmable digital thermostat is designed for both conventional and heat pump systems, offering versatile functionality and user-friendly operation. Congratulations on choosing a thermostat engineered for years of reliable service!
This manual serves as a comprehensive resource, guiding you through every aspect of your thermostat – from initial setup and wiring to advanced programming and troubleshooting. Whether you’re a homeowner or a professional installer, this guide provides the information needed to maximize the benefits of your new Honeywell thermostat. It’s pre-programmed and ready to use, requiring only time and date setting, and optional adjustments to pre-existing settings.
Explore features like selectable changeover control (manual or auto) and adjustable temperature ranges to tailor the system to your specific needs.
Understanding the FocusPRO 6000 Series
The Honeywell FocusPRO 6000 series, including the TH6110D1005/U model, is renowned for its reliability and ease of use in home heating and cooling systems. These thermostats are designed to provide precise temperature control, enhancing comfort and potentially reducing energy consumption. They support 1 heat/1 cool conventional systems, as well as heat pump configurations, offering broad compatibility.
A key feature of the FocusPRO 6000 series is its intuitive interface, making programming and adjustments straightforward for users of all technical levels. The series offers both automatic and manual changeover options, allowing for customized system operation. Furthermore, adjustable temperature ranges – typically 40°F to 90°F for heating – provide flexibility to suit individual preferences.
This series prioritizes user convenience, with pre-programmed settings and a clear display, ensuring a smooth transition to optimized home climate management.

Installation and Setup
Begin with care! Proper wiring, battery installation, and accurate time/date settings are crucial for optimal performance of your new Honeywell TH6110D1005/U thermostat.
Initial Setup and Wiring
Carefully disconnect power to your heating and cooling system at the breaker before beginning any wiring. The Honeywell TH6110D1005/U is designed for conventional 1 heat/1 cool systems and heat pumps.
Refer to the wiring diagram included with your thermostat and the existing wiring configuration at your old thermostat. Label each wire before disconnecting it – this is extremely important! Common terminals include Rh, Rc, W, Y, G, and C.
The ‘C’ wire (common wire) provides continuous power to the thermostat. If you don’t have a C wire, you may need to install one or use a compatible add-a-wire kit. Connect the wires to the corresponding terminals on the thermostat baseplate, ensuring a secure connection. Double-check all connections before proceeding. Incorrect wiring can damage your system!
Once wiring is complete, securely mount the thermostat baseplate to the wall.
Battery Installation and Power-Up
The Honeywell TH6110D1005/U thermostat requires two AA alkaline batteries for operation, even with a ‘C’ wire connected. This ensures continued functionality during power outages. Locate the battery compartment on the thermostat – it’s typically accessed after removing the thermostat body from the baseplate.
Insert the batteries, observing the correct polarity (+ and -) as indicated inside the compartment. Ensure the batteries are securely seated. Once the batteries are installed, reattach the thermostat body to the baseplate.
The display should illuminate, indicating the thermostat is receiving power. If the display doesn’t turn on, double-check the battery installation and ensure the batteries are fresh. The thermostat will then prompt you to set the current time and date, initiating the setup process.
Proper battery installation is crucial for reliable performance.
Setting the Time and Date
After powering up, your Honeywell TH6110D1005/U thermostat will immediately guide you through setting the correct time and date. This is a fundamental step for accurate scheduling and operation. Use the up and down arrow buttons to adjust the hour, then press the ‘Next’ button to move to minute setting. Repeat the process for setting the month and day.
Confirm each selection by pressing ‘Next’ until you reach the year. Ensure you select the correct AM or PM designation. Once the date and time are accurately set, press ‘Done’ or ‘Accept’ to save your changes.
Accurate time and date settings are essential for the programmed schedules to function correctly, maximizing energy savings and comfort. Verify the settings periodically, especially after power outages.
Correct settings ensure optimal thermostat performance.

Thermostat Operation
Effortless control! Easily adjust your home’s temperature using intuitive settings for heat, cool, auto, and off modes, alongside flexible fan control options;
Basic Operation: Adjusting Temperature
Adjusting the temperature with your Honeywell TH6110D1005/U thermostat is straightforward. The primary display shows the current room temperature, and you can easily modify the setpoint using the up and down arrow buttons. Pressing the up arrow increases the desired temperature, while the down arrow decreases it.
The thermostat responds immediately, initiating the heating or cooling system to reach the selected temperature. Observe the display to confirm the new setpoint. Remember that the temperature is displayed in Fahrenheit, with a range of 40°F to 90°F for heating and cooling.
For precise control, allow sufficient time for the system to respond to adjustments. The thermostat continuously monitors the room temperature and adjusts operation accordingly, providing consistent comfort. Familiarize yourself with these basic controls to optimize your home’s climate.
System Modes: Heat, Cool, Auto, and Off
Your Honeywell TH6110D1005/U thermostat offers four distinct system modes: Heat, Cool, Auto, and Off. Selecting Heat activates the heating system to maintain the set temperature. Conversely, Cool engages the cooling system. The Auto mode intelligently switches between heating and cooling to maintain your desired temperature, optimizing energy efficiency.
To cycle through these modes, use the System button on the thermostat. The current mode is clearly displayed on the screen. The Off mode disables both heating and cooling, allowing for manual control or energy savings when climate control isn’t needed.
Understanding these modes allows you to tailor the thermostat’s operation to your specific needs and preferences, ensuring optimal comfort and energy conservation throughout the year.
Fan Control: Auto and On Settings
The Honeywell TH6110D1005/U thermostat provides two fan control settings: Auto and On. In Auto mode, the fan operates only during heating or cooling cycles, circulating air when needed for temperature regulation. This is the most energy-efficient setting for typical use.
Selecting On mode forces the fan to run continuously, regardless of whether heating or cooling is active. This provides consistent air circulation, which can improve air quality and distribute temperature more evenly throughout your home. However, continuous fan operation consumes more energy.
You can easily switch between these settings using the Fan button on the thermostat. The selected mode is displayed on the screen, allowing you to customize airflow to your comfort preferences.

Advanced Features and Settings
Explore sophisticated options like programmable schedules, temperature range adjustments, changeover control, and Function 12 system settings for personalized comfort and efficiency.
Programming Schedules: Setting Daily and Weekly Programs
Maximize energy savings and comfort with the Honeywell TH6110D1005/U’s programmable scheduling feature. This allows you to create customized heating and cooling programs tailored to your lifestyle. You can set different temperatures for various times of the day, and different days of the week, ensuring optimal comfort when you’re home and conserving energy when you’re away.

The thermostat supports four programmable periods daily: Wake, Leave, Return, and Sleep. Each period allows you to define a specific temperature setting. Weekly schedules can be created individually for each day, or you can copy a schedule to multiple days for convenience. Access the programming mode through the thermostat’s menu, and follow the on-screen prompts to set your desired temperatures and time periods. Remember to save your changes!
Consider your daily routines when creating your schedule. For example, lower the temperature while you’re at work or asleep, and raise it before you wake up or return home. This proactive approach can significantly reduce your energy bills.
Temperature Range Settings (Heat & Cool)
Customize your comfort levels with the Honeywell TH6110D1005/U’s adjustable temperature range settings for both heating and cooling modes. This feature allows you to define the minimum and maximum temperatures the thermostat will allow, providing a safety net and preventing extreme settings. The heat range is typically adjustable from 40°F to 90°F, while the cool range spans from 50°F to 90°F, though these may vary slightly.
Access these settings through the thermostat’s menu, navigating to the “Temperature Range” option. Adjusting these limits can be particularly useful if you have children or elderly individuals in the home, preventing accidental extreme temperature adjustments. It also safeguards your HVAC system from operating outside its optimal range.
Remember to consider your comfort preferences and the capabilities of your heating and cooling system when setting these limits. Incorrect settings could hinder the system’s performance.
Changeover Control: Manual vs. Auto
The Honeywell TH6110D1005/U offers two changeover control options: Manual and Auto. Manual changeover requires you to explicitly switch between Heat, Cool, and Off modes, providing complete control but demanding user intervention. Auto changeover, conversely, intelligently manages the transition based on the setpoint and ambient temperature.
To configure this, access “Function 12” within the Installer Setup. Selecting “0” sets Manual changeover, while “1” activates Auto changeover. Auto mode is ideal for consistent comfort, automatically switching to heating when the temperature drops below the heat setpoint and cooling when it exceeds the cool setpoint.
Consider your climate and preferences when choosing. Manual is suited for predictable weather, while Auto excels in fluctuating conditions, optimizing energy efficiency and maintaining a consistent indoor climate.
Function 12: System Setting Configuration
Function 12 within the Honeywell TH6110D1005/U’s Installer Setup is a crucial configuration point, dictating core system behavior. This function primarily controls the changeover method – whether the thermostat operates in Manual or Auto mode for switching between heating and cooling. A setting of “0” designates Manual changeover, requiring user input to select Heat, Cool, or Off;
Conversely, a setting of “1” enables Auto changeover, allowing the thermostat to intelligently determine the appropriate mode based on setpoints and sensed temperature. Accessing Function 12 requires navigating the installer menu, typically involving a specific button sequence.

Incorrect configuration can lead to inefficient operation or discomfort, so carefully review your system requirements before adjusting this setting. Refer to the full manual for detailed step-by-step instructions on accessing and modifying Function 12.

Troubleshooting Common Issues
Resolve problems quickly! This section provides solutions for temperature setting failures, display errors, and connectivity issues with your Honeywell TH6110D1005/U.
Temperature Settings Not Changing
Experiencing unresponsive temperature adjustments? Several factors could be at play with your Honeywell TH6110D1005/U thermostat. First, verify heating and cooling temperature ranges are appropriately set within the thermostat’s configuration – typically between 40°F and 90°F for both heating and cooling modes.
Check for proper wiring connections at the thermostat and the HVAC system. Loose or incorrect wiring can prevent signals from reaching the heating or cooling equipment. Ensure the thermostat is receiving sufficient power; low batteries can cause erratic behavior.
Confirm the system mode is correctly selected (Heat, Cool, Auto, or Off). If set to ‘Off’, the thermostat won’t activate heating or cooling. Finally, review Function 12 (System Setting) to ensure it’s configured correctly for your system type – either Manual or Auto changeover.
If issues persist, consult the full owner’s manual for detailed troubleshooting steps.
Display Issues and Error Codes

A blank or malfunctioning display on your Honeywell TH6110D1005/U thermostat often indicates a power issue. Begin by replacing the batteries with fresh ones, even if the display shows some activity. If the problem continues, inspect the wiring connections to ensure a secure power supply from the HVAC system.
Error codes displayed on the screen signal specific problems. Refer to the comprehensive owner’s manual for a complete list of codes and their corresponding solutions. Common issues include sensor failures, communication errors with the HVAC system, or internal thermostat malfunctions.
Attempt a thermostat reset by removing power (batteries and/or breaker) for several minutes, then restoring it. If error codes persist after a reset, professional HVAC assistance may be required to diagnose and resolve the underlying issue.
Always consult the manual for specific code definitions.
Connectivity Problems (if applicable)
The Honeywell TH6110D1005/U is primarily a standalone thermostat and does not natively support direct Wi-Fi connectivity. However, it can be integrated with certain Honeywell Home systems using compatible accessories like the C2 Wi-Fi Thermostat Adapter. If you’ve added such an adapter and are experiencing connectivity issues, several steps can be taken.
Verify your home Wi-Fi network is functioning correctly and that the adapter is within range. Check the Honeywell Home app for adapter status and follow the app’s troubleshooting guidance. Ensure the adapter’s firmware is up-to-date.
Restart both the adapter and your home router. If problems persist, consult the Honeywell Home support website or contact their customer service for assistance with network configuration and adapter compatibility.
Remember, direct connectivity isn’t a standard feature of this model.

Manual Download and Resources
Access the official Honeywell TH6110D1005/U manual online, alongside helpful support resources, ensuring you have everything needed for optimal thermostat performance.
Where to Download the Official Manual
Finding the official Honeywell TH6110D1005/U manual is straightforward! Honeywell provides several convenient avenues for accessing this crucial resource. You can typically locate the PDF version directly on the Honeywell Home website, within their support section dedicated to thermostats.
A quick online search using keywords like “Honeywell TH6110D1005/U manual PDF” will also yield reliable download links from authorized distributors and documentation websites. Be cautious of unofficial sources to ensure you’re receiving a legitimate and virus-free copy.
Furthermore, many HVAC equipment suppliers and installers offer downloadable manuals for the products they service. Checking their websites can be another effective method. Having the manual readily available empowers you to troubleshoot issues, understand advanced features, and maximize the benefits of your FocusPRO 6000 thermostat.
Accessing Honeywell Support
Need assistance with your Honeywell TH6110D1005/U thermostat? Honeywell offers a comprehensive suite of support options to address your questions and concerns. Their official website, Honeywell Home, features an extensive FAQ section, troubleshooting guides, and downloadable resources specifically for the FocusPRO 6000 series.
You can also connect with Honeywell support directly via phone. Their customer service representatives are knowledgeable and can provide personalized assistance. Additionally, Honeywell often provides a live chat feature on their website for immediate support.
Explore online forums and communities dedicated to Honeywell products, where fellow users share tips and solutions. Remember to have your thermostat’s model number readily available when contacting support for faster and more accurate assistance.
Understanding System Compatibility
Ensuring compatibility is crucial for optimal performance of your Honeywell TH6110D1005/U thermostat. This model supports both conventional (1 heat/1 cool) and heat pump systems, offering versatile control. However, it’s vital to verify your existing HVAC system’s wiring and voltage requirements before installation.
The TH6110D1005/U is designed for low-voltage systems, typically 24VAC. Confirm your system operates within this range. Incorrect wiring or voltage mismatches can damage the thermostat or your HVAC equipment.
Consider whether your system utilizes features like auxiliary heat or emergency heat, and ensure the thermostat is configured accordingly. Refer to the official manual for detailed compatibility charts and wiring diagrams to guarantee a seamless integration.

Technical Specifications
Power requirements are crucial; this thermostat utilizes battery power, ensuring reliable operation. Temperature accuracy is maintained within ±1°F, providing precise climate control.
Power Requirements
The Honeywell TH6110D1005/U thermostat is designed to operate primarily on battery power, offering flexibility and eliminating the need for common wiring in many installations. Specifically, this thermostat requires two AA alkaline batteries for standard operation, providing a reliable and consistent power source.
Battery life typically ranges from 12 to 24 months, depending on usage patterns and battery quality. A low battery indicator will appear on the display, alerting you when replacement is necessary, preventing unexpected temperature control interruptions. It’s recommended to use high-quality alkaline batteries for optimal performance and longevity.
While a “C” wire (common wire) can be connected for continuous power, it is not a requirement for basic functionality. Utilizing a C wire can extend battery life significantly and is recommended for systems with specific power demands or features. Always refer to the official installation manual for detailed wiring instructions and compatibility information.
Temperature Accuracy
The Honeywell TH6110D1005/U thermostat is engineered to provide reliable and consistent temperature readings, ensuring accurate climate control within your home. Generally, the thermostat boasts a temperature accuracy of ±1°F (±0.6°C) under normal operating conditions. However, several factors can influence this accuracy.
Placement is crucial; avoid direct sunlight, drafts, or proximity to heat-generating appliances. These external influences can skew temperature readings. The thermostat’s internal sensor requires adequate airflow for precise measurements. Calibration adjustments are not typically user-accessible on this model, relying on factory settings for optimal performance.
Regularly verifying the thermostat’s accuracy against a calibrated thermometer is recommended. Minor variations are normal, but significant discrepancies may indicate a need for professional inspection or replacement. Maintaining a stable environment contributes to consistent and dependable temperature control.
