Honeywell TH6110D1021 Thermostat: A Comprehensive Guide
The Honeywell TH6110D1021 is a programmable thermostat offering 5-1-1 scheduling, compatible with 1 heat/1 cool systems, and operates on 24V power.
Overview of the TH6110D1021
The Honeywell TH6110D1021/U FocusPRO Programmable Thermostat represents a reliable and user-friendly solution for residential heating and cooling control. This thermostat is designed for systems requiring 1 Heat and 1 Cool stage operation, offering efficient temperature management. It boasts a large, backlit display for easy readability, enhancing the user experience.
Powering the TH6110D1021 can be achieved through both battery and hardwired configurations, providing installation flexibility. Its programmability, specifically the 5-1-1 schedule, allows for customized comfort settings throughout the week – different settings for weekdays, a single setting for Saturday, and another for Sunday.
The thermostat’s compatibility extends to standard 24V heating and cooling systems. Resources like the product brochure, installation instructions, user guide, and range stop instructions are readily available for download, ensuring a smooth setup and operation. It’s part of the Resideo FocusPRO series, known for its dependable performance and straightforward functionality.
Key Features and Specifications
The Honeywell TH6110D1021 boasts several key features, starting with its programmable functionality utilizing a 5-1-1 schedule – ideal for weekly temperature adjustments; It supports 1 Heat and 1 Cool stages, making it suitable for conventional HVAC systems. The thermostat operates on a 24V power source and can be powered by batteries or hardwiring, offering installation versatility.
Its large, backlit display ensures clear visibility, even in low-light conditions, and provides a user-friendly interface. The control range spans from 40 to 90 degrees Fahrenheit, accommodating a wide range of climates. Dimensions are approximately 4.84 square inches.
This model, part of the FocusPRO series, offers one-touch temperature control for easy overrides. Downloadable resources, including the user guide (69-2695EFS.pdf), provide comprehensive support. It’s designed for straightforward operation and reliable performance, making it a popular choice for residential temperature management. The unit is currently in stock with 119 available.
Thermostat Type and Stages
The Honeywell TH6110D1021 is classified as a programmable thermostat, designed for efficient and customized climate control within residential settings. It falls under the FocusPRO series, known for its reliability and ease of use. This particular model is specifically configured to manage systems with 1 Heat and 1 Cool stage operation. This means it can control a single heating source and a single cooling source, making it ideal for standard HVAC setups.
Unlike more complex thermostats, the TH6110D1021 doesn’t support heat pump functionality directly, focusing on conventional heating and cooling systems. Its stage configuration simplifies operation, providing straightforward temperature regulation without the complexities of multi-stage systems. The thermostat type is hardwire or battery powered, offering flexibility during installation.

Understanding the 1H/1C stage capability is crucial for proper system compatibility, ensuring optimal performance and energy efficiency. It’s a robust and dependable choice for basic heating and cooling needs.
Programmability Options (5-1-1 Schedule)
The Honeywell TH6110D1021 boasts a 5-1-1 programmable schedule, offering a balance between customization and simplicity. This schedule allows users to set different temperatures for five weekdays, one Saturday setting, and one Sunday setting. This flexibility enables efficient energy management by automatically adjusting temperatures based on occupancy patterns throughout the week.
The 5-1-1 schedule is particularly useful for households with consistent weekday routines, allowing for lower temperatures during work or school hours and comfortable temperatures during evenings and weekends; Programming is done directly on the thermostat’s interface, offering a user-friendly experience. Users can easily override the programmed schedule with one-touch temperature control for immediate adjustments.
This level of programmability contributes to significant energy savings and enhanced comfort, making the TH6110D1021 a practical choice for homeowners seeking to optimize their HVAC usage.
System Compatibility (Heating & Cooling)
The Honeywell TH6110D1021 thermostat is designed for broad compatibility with standard heating and cooling systems. Specifically, it supports 1 Heat/1 Cool conventional systems, making it suitable for most residential applications. This means it can control a single-stage furnace for heating and a single-stage air conditioner for cooling.
While not directly compatible with heat pump systems as a standard configuration, it can often be adapted with appropriate wiring and settings adjustments. However, consulting a qualified HVAC technician is recommended for heat pump installations to ensure proper functionality and avoid system damage. The thermostat operates on 24V systems, a common standard in residential HVAC setups.
Its versatility and ease of integration make the TH6110D1021 a reliable choice for upgrading existing systems or new installations where a simple, effective heating and cooling control is desired.
Voltage and Power Source
The Honeywell TH6110D1021 thermostat operates on a standard 24-volt AC power source, commonly found in most residential heating and cooling systems. This low-voltage operation ensures safety and compatibility with existing HVAC wiring. A key feature of this model is its flexible power options – it can be powered by either batteries or hardwired directly to the HVAC system’s power supply.
Battery power provides a convenient option for installations where hardwiring is difficult or unavailable, offering a simple, wireless solution. However, hardwiring ensures a continuous power supply, eliminating the need for battery replacements and guaranteeing consistent operation.
The thermostat’s design accommodates both power sources seamlessly, providing users with a choice based on their installation preferences and requirements. Proper wiring is crucial for optimal performance and safety, so consulting the installation guide or a qualified technician is recommended.
Display and User Interface
The Honeywell TH6110D1021 boasts a large, backlit display, designed for clear visibility even in dimly lit environments. This user-friendly interface simplifies thermostat operation, making it accessible for users of all technical levels. The display prominently shows the current temperature, setpoint, and operating mode (heat, cool, or auto). Navigation is straightforward, utilizing intuitive buttons for adjusting settings, programming schedules, and overriding temperature controls.
The thermostat features “one-touch” temperature control, allowing for quick and easy temporary adjustments without disrupting the programmed schedule. The large buttons and clear labeling contribute to a positive user experience, minimizing confusion and ensuring efficient operation. The backlit feature enhances readability, particularly during nighttime or in poorly illuminated spaces.
Overall, the display and user interface are designed for simplicity and ease of use, providing a comfortable and convenient experience for managing home climate control;
Installation Instructions Resources
Successfully installing the Honeywell TH6110D1021 requires careful attention to detail and adherence to safety guidelines. Fortunately, Honeywell (now Resideo) provides comprehensive resources to assist with the installation process. A detailed installation brochure is readily available for download, offering step-by-step instructions and clear diagrams. This guide covers wiring configurations, mounting procedures, and initial setup steps.
Additionally, a comprehensive user guide is accessible online, providing further clarification and troubleshooting tips; These resources are crucial for both professional installers and DIY enthusiasts. Proper installation ensures optimal performance and longevity of the thermostat. It’s vital to disconnect power before beginning any wiring work and to consult a qualified technician if you are uncomfortable with any aspect of the installation.
Links to these essential documents – the brochure, installation guide, and user manual – can be found on the Resideo website, ensuring easy access to the necessary information.
User Guide and Documentation
The Honeywell TH6110D1021 thermostat comes with extensive documentation designed to help users understand and utilize its features effectively. The primary resource is the detailed user guide, available for download from the Resideo website. This guide explains the thermostat’s interface, programming options (specifically the 5-1-1 schedule), and override functions. It details how to navigate the menu system, set temperature preferences, and manage different operating modes for heating and cooling.
The documentation also covers essential aspects like battery replacement, display settings, and basic troubleshooting steps. Understanding the 5-1-1 programming allows for customized comfort schedules, optimizing energy efficiency. The guide clarifies how to adjust settings for weekdays, weekends, and individual days. Furthermore, the documentation provides information on interpreting the thermostat’s display and responding to error messages.

Accessing the downloadable PDF ensures users have a readily available reference for all aspects of thermostat operation.
Range Stop Instructions

Range stop adjustments on the Honeywell TH6110D1021 thermostat are crucial for limiting the temperature range, particularly in commercial or multi-unit dwellings, preventing excessive heating or cooling. The user manual details how to access the range stop settings through the thermostat’s menu. These settings restrict the highest heat and lowest cool temperatures the thermostat will allow.

To adjust the range stops, users typically navigate to the “Settings” or “Advanced” menu, then select “Temperature Limits” or a similarly named option. Within this menu, separate settings exist for heating and cooling. The manual emphasizes carefully setting these limits to avoid discomfort or energy waste. Incorrect range stop settings can override programmed schedules and user overrides.
Properly configured range stops enhance energy management and ensure consistent comfort levels. Refer to the downloadable installation instructions and user guide for precise step-by-step guidance on range stop configuration.

Honeywell FocusPRO Series Comparison
The Honeywell TH6110D1021 belongs to the FocusPRO series, offering a balance of features and affordability. Compared to the TH2110DH1002/U, the TH6110D1021 provides advanced programmability with its 5-1-1 schedule, while the TH2110DH1002/U is a non-programmable model, suited for simpler heating and cooling needs. The TH4110U2005/U steps up with 7-day programmability and potentially more advanced features.
Key distinctions lie in the scheduling options and display size. The TH6110D1021 features a large, backlit display for improved visibility. The TH2320U4006/U offers even more advanced features, including remote access capabilities. All FocusPRO models share a similar installation process and compatibility with standard 24V heating and cooling systems.
Choosing the right model depends on individual needs and budget. The TH6110D1021 provides a sweet spot for users desiring programmability without the complexity of higher-end models. Consult the product overview and comparison charts for detailed specifications.
TH6110D1021 vs. Other Models (TH2110DH1002/U, TH4110U2005/U)
Comparing the TH6110D1021 to the TH2110DH1002/U and TH4110U2005/U reveals key differences. The TH2110DH1002/U is a basic, non-programmable thermostat, ideal for simple heating and cooling control, lacking the scheduling features of the TH6110D1021. It’s a cost-effective option for those needing only manual temperature adjustments.

The TH4110U2005/U offers a more comprehensive 7-day programmable schedule, exceeding the 5-1-1 programmability of the TH6110D1021. It also supports 3H/2C systems, offering greater flexibility for complex HVAC setups. The TH6110D1021, with its 1H/1C configuration, suits standard heating and cooling systems.

Display size is also a factor; the TH6110D1021 features a large, backlit display. Ultimately, the best choice depends on your HVAC system’s complexity and desired level of control. The TH6110D1021 strikes a balance between features and price, while the others cater to simpler or more advanced needs.

Temperature Control and Override Functions
The Honeywell TH6110D1021 provides precise temperature control through its programmable schedule and manual override capabilities. Users can set desired temperatures for different times of the day and days of the week, optimizing comfort and energy savings. The thermostat’s control range spans from 40 to 90 degrees Fahrenheit, accommodating a wide range of climates.
A key feature is the “One-Touch Temp Control,” allowing for quick and temporary overrides of the programmed schedule. This is useful for immediate comfort adjustments without disrupting the long-term settings. The override function maintains the new temperature until the next scheduled change or until manually reset.
Furthermore, the thermostat supports both heating and cooling modes, automatically switching between them based on the setpoint and system configuration. This ensures consistent comfort throughout the year. The large, backlit display clearly shows the current temperature and setpoint, enhancing usability and convenience.
Troubleshooting Common Issues
Common issues with the Honeywell TH6110D1021 often relate to power or incorrect wiring. If the display is blank, check the batteries (if battery-powered) or the circuit breaker (if hardwired). Ensure proper wiring connections according to the installation instructions, verifying the C-wire is correctly connected for consistent power.
Temperature discrepancies can occur due to improper thermostat placement, exposure to drafts, or sunlight. Calibrate the thermostat if needed, following the user guide’s instructions. If the system isn’t responding to changes, confirm the system type (heating/cooling) is correctly configured within the thermostat settings.
For unresponsive touchscreens, try replacing the batteries. If problems persist, consult the Resideo (Honeywell) support website for detailed troubleshooting guides and downloadable resources like the 69-2695EFS.pdf document. Always disconnect power before attempting any wiring adjustments.

Resideo (Honeywell) Support and Downloads
Resideo, the company now encompassing Honeywell Home, provides extensive support resources for the TH6110D1021 thermostat. Their official website is the primary hub for accessing crucial documentation, including the comprehensive user guide detailing setup, operation, and advanced features. You can find the Install Instructions readily available for download, ensuring a smooth installation process.
Specifically, the 69-2695EFS.pdf document offers in-depth technical information and troubleshooting steps. Resideo’s support portal also features a robust FAQ section addressing common user queries. For direct assistance, customers can access phone support or utilize online chat features.
Furthermore, Resideo provides a range of downloadable resources, including product brochures and specification sheets. These materials offer a detailed overview of the TH6110D1021’s capabilities and compatibility. Regularly check the Resideo website for firmware updates and the latest support information.
Customer Reviews and Ratings
The Honeywell TH6110D1021 generally receives positive customer feedback, currently holding a rating based on (68) reviews and (13) Q&A interactions. Many users praise its straightforward programming, particularly the 5-1-1 schedule, making it easy to customize heating and cooling preferences. The large, backlit display is frequently cited as a significant advantage, enhancing readability in various lighting conditions.
Several reviewers highlight the thermostat’s compatibility with existing HVAC systems, simplifying the upgrade process. However, some users mention a slight learning curve when initially navigating the menu options. Installation is generally considered manageable for DIY enthusiasts, aided by readily available online resources and the official installation guide.
Overall, customers appreciate the TH6110D1021’s reliability and energy-saving capabilities, making it a popular choice for residential heating and cooling control. Price point at $122.48 each is considered reasonable for the features offered.









































































