Honeywell TH6110D1005 Manual: A Comprehensive Guide
This manual details the Honeywell TH6110D1005 thermostat, offering specifications, installation, operation, and troubleshooting. It’s designed for users seeking reliable service and easy push-button controls.

Discover how to maximize your new Honeywell thermostat’s potential with this comprehensive guide, covering everything from battery installation to advanced system settings.
The Honeywell TH6110D1005 is a programmable thermostat designed for comfortable and efficient home climate control. This user manual serves as a complete resource, guiding you through installation, operation, and troubleshooting of your new thermostat. It’s a popular choice for its compatibility with standard heating and cooling systems, offering up to one heat and one cool stage operation.
Congratulations on selecting a Honeywell thermostat! This device is engineered for years of dependable service, featuring an intuitive interface and straightforward push-button controls. Whether you’re a homeowner or a professional installer, this guide provides the necessary information to ensure proper setup and optimal performance. The TH6110D1005 is designed to enhance your home’s energy efficiency and provide consistent comfort.
This manual will cover everything from initial wiring and battery installation to programming schedules and understanding error codes. It also includes important safety information and warranty details, ensuring a smooth and informed experience with your Honeywell thermostat.
Key Features and Specifications
The Honeywell TH6110D1005 boasts several key features, including programmable 7-day scheduling, allowing customized temperature settings for different times and days. It supports up to one heat and one cool stage, making it suitable for many common HVAC systems. The thermostat operates on battery power or can be hardwired for continuous operation, offering installation flexibility.
Key specifications include a display designed for clear readability of temperature and settings. It’s compatible with various system types and features easy-to-use push-button controls. The thermostat is designed for wall mounting and includes necessary mounting hardware. It’s a U.S. Registered Trademark with patents pending, reflecting Honeywell’s commitment to innovation.
Furthermore, the TH6110D1005 offers precise temperature control and energy-saving capabilities. Detailed specifications, including dimensions and electrical ratings, are available in the accompanying specification sheet found online. This thermostat provides a balance of functionality, reliability, and ease of use.
Package Contents
Upon opening the Honeywell TH6110D1005 package, you should find several essential components to facilitate a smooth installation and operation. The core item, of course, is the Honeywell TH6110D1005 programmable thermostat itself. Included is a comprehensive operating manual, providing detailed instructions on setup, programming, and troubleshooting.
Additionally, the package contains the necessary mounting hardware, including screws and wall anchors, to securely attach the thermostat to your wall. A battery is typically included to allow for immediate operation, even before hardwiring. You’ll also find documentation related to warranty information and recycling instructions.
Please verify that all listed components are present before proceeding with the installation. While the package is designed to be complete, contacting Honeywell customer support is recommended if any items are missing or damaged. Refer to the included documentation for specific part numbers and support contact details.

Installation Guide
Proper installation ensures optimal performance. This section details wiring diagrams, battery and hardwired power connections, and secure thermostat mounting procedures for the TH6110D1005.
Wiring Diagram and Connections
Careful wiring is crucial for correct operation. The Honeywell TH6110D1005 supports up to one heat and one cool stage. Refer to the detailed wiring diagram included in the full manual for specific terminal designations – typically labeled R, C, W, Y, and G.
Ensure power is OFF at the breaker before making any connections. The ‘R’ terminal receives 24VAC power, ‘C’ is the common wire, ‘W’ controls heating, ‘Y’ controls cooling, and ‘G’ activates the fan. Incorrect wiring can damage the thermostat or your HVAC system.
Compatibility is key; verify your existing wiring matches the thermostat’s requirements. If you have a heat pump system, additional wiring may be necessary. When connecting wires, use appropriate wire connectors and ensure a secure fit. Double-check all connections before restoring power.
Consult a qualified HVAC technician if you are unsure about any aspect of the wiring process.
Battery Installation
The Honeywell TH6110D1005 operates on battery power, typically requiring two AA alkaline batteries. While the thermostat can also be hardwired, batteries provide a backup power source, maintaining settings during power outages. Locate the battery compartment, usually on the side or back of the unit.
Open the compartment and insert the batteries, observing the correct polarity (+ and -) as indicated inside. Ensure the batteries are securely seated. The display should illuminate briefly, confirming proper installation. Replace the battery compartment cover.
Low battery indicators will appear on the display when replacement is needed. It’s recommended to replace batteries annually or when the low battery icon appears to prevent loss of programmed settings. Use only fresh, alkaline batteries for optimal performance. Avoid mixing old and new batteries.
Proper battery installation ensures reliable operation and prevents data loss.
Hardwired Power Source Connection
The Honeywell TH6110D1005 can be powered by a hardwired connection, providing continuous operation without relying solely on batteries. Important: Disconnect power at the circuit breaker before beginning any wiring. Locate the terminal block on the thermostat’s backplate.
Connect the 24VAC common (C) wire to the designated ‘C’ terminal. This provides constant power. If your existing system doesn’t have a C-wire, consult a qualified HVAC technician for assistance – a C-wire adapter may be necessary. Ensure all wiring is secure and conforms to local electrical codes.

Double-check all connections before restoring power at the breaker. Even with a hardwired connection, it’s advisable to install batteries as a backup, safeguarding your settings during brief power interruptions. Incorrect wiring can damage the thermostat or your HVAC system.
Professional installation is recommended if you are unfamiliar with electrical wiring.
Mounting the Thermostat
After wiring, carefully mount the Honeywell TH6110D1005 thermostat to the wall. Use the included mounting screws and wall anchors if necessary, ensuring a secure and level installation. The backplate should align with any existing screw holes from your previous thermostat, simplifying the process.
Before fully securing the thermostat, gently push any excess wiring back into the wall opening to prevent pinching or damage. Align the thermostat body with the backplate and snap it firmly into place. Verify it’s securely attached and doesn’t wobble.
Ensure the thermostat is positioned away from direct sunlight, drafts, and heat-generating appliances, as these can affect temperature readings. A central location on an interior wall is generally best. Once mounted, proceed to power on the thermostat and verify display functionality.
Proper mounting ensures accurate temperature sensing and reliable operation.

Operating Instructions
The Honeywell TH6110D1005 features intuitive controls for temperature adjustments, scheduling, and fan operation. Easily navigate the display to customize your comfort settings.
Understanding the Display
The Honeywell TH6110D1005 thermostat display provides crucial information at a glance. Typically, you’ll see the current room temperature prominently displayed, alongside the set temperature. The display clearly indicates the current system mode – Heat, Cool, or Auto – allowing for quick verification of operation.
Icons represent fan settings (Auto or On) and system status. A flame icon signifies heating is active, while a snowflake indicates cooling. The display also shows programmed schedules, often with a clock icon to confirm schedule activation.
Error codes, if present, will appear on the display, signaling potential issues with the system. Refer to the troubleshooting section of this manual to decipher these codes. The backlight enhances visibility in low-light conditions, ensuring easy readability. Familiarizing yourself with these display elements is key to effectively operating your thermostat.
Setting the Temperature
To adjust the temperature on your Honeywell TH6110D1005, use the up and down arrow buttons located on the thermostat face. Pressing the “up” arrow increases the set temperature, while the “down” arrow decreases it. The display will show the new setpoint as you adjust it.
The thermostat allows you to set separate temperatures for heating and cooling modes. Ensure you are in the desired mode (Heat or Cool) before making adjustments. The current mode is clearly indicated on the display.
If the temperature doesn’t change, verify that the setpoint is within the acceptable range for your heating and cooling systems. Some systems have limitations on how high or low the temperature can be set. Remember to allow sufficient time for the system to respond to temperature changes.
Programming Schedules
The Honeywell TH6110D1005 allows for programmable schedules to optimize comfort and energy savings. Access the programming mode by pressing the “Menu” or “Program” button (refer to your specific model’s display prompts). You can then set different temperatures for different times of the day and days of the week.
Typically, you’ll define four periods: Wake, Leave, Return, and Sleep. For each period, you’ll specify a start time and a desired temperature. The thermostat will automatically adjust the temperature based on your programmed schedule.

To edit a schedule, navigate to the desired day and period. Use the arrow buttons to adjust the time and temperature settings. Save your changes to activate the new schedule. Consider your daily routines when creating a schedule to maximize energy efficiency and comfort.
Fan Control Settings
The Honeywell TH6110D1005 offers several fan control options to enhance your comfort. You can typically select from “Auto” and “On” modes. In “Auto” mode, the fan operates only during heating or cooling cycles, providing efficient air circulation when needed.
Selecting “On” mode keeps the fan running continuously, even when the heating or cooling system isn’t actively working. This can help to distribute air more evenly throughout your home and improve air quality, but it will consume more energy;
Access the fan control settings through the thermostat’s menu. Use the navigation buttons to select your preferred mode. Some models may also offer a “Circulate” setting, which runs the fan intermittently to maintain consistent temperatures. Experiment with different settings to find what best suits your needs and preferences.

Troubleshooting
This section addresses common issues like no display, temperature setting problems, and connectivity concerns. Resetting the thermostat often resolves minor operational difficulties quickly.
No Display Issues
If your Honeywell TH6110D1005 thermostat display is blank, several factors could be at play. First, verify the battery installation; even seemingly new batteries might lack sufficient charge. Ensure they are correctly positioned, observing the polarity markings within the battery compartment.
For hardwired installations, confirm the power source is active and delivering consistent voltage to the thermostat. Check the circuit breaker associated with the HVAC system. A tripped breaker will obviously cause a power outage.
Inspect the wiring connections to ensure they are secure and haven’t become loose over time. A loose wire can interrupt the power supply to the display. If the issue persists after checking these basic elements, consult a qualified HVAC technician for further diagnosis and repair. A faulty thermostat component might require professional attention.
Remember to always disconnect power before inspecting wiring!
Temperature Setting Problems
If your Honeywell TH6110D1005 isn’t responding to temperature adjustments, first confirm you’re within the acceptable heating and cooling ranges programmed into the thermostat. The system won’t engage if the desired temperature is too close to the current room temperature.
Verify the system mode is correctly set to ‘Heat’ or ‘Cool’ depending on your needs. An incorrect mode will prevent the thermostat from initiating the appropriate HVAC function. Also, check if the programmed schedule is overriding your manual temperature settings.
Ensure the thermostat is calibrated correctly. While the TH6110D1005 doesn’t offer extensive calibration options, significant discrepancies might indicate a sensor issue. If problems persist, examine the wiring connections to the heating and cooling systems, ensuring they are secure. If none of these steps resolve the issue, professional HVAC assistance is recommended.
Connectivity Issues
The Honeywell TH6110D1005 is primarily a standalone thermostat and doesn’t inherently possess advanced connectivity features like Wi-Fi. Therefore, “connectivity issues” typically relate to communication between the thermostat and the HVAC system itself, not external networks.
If your system isn’t responding to the thermostat’s signals, double-check the wiring connections. Loose or corroded wires can disrupt the communication pathway. Verify the thermostat is receiving power – a weak battery or a faulty hardwired connection can cause intermittent operation.
Confirm compatibility with your HVAC system. While generally compatible with standard systems, certain configurations might require adapters or professional installation. If issues persist after verifying wiring and power, consult an HVAC technician to diagnose potential problems within your heating or cooling equipment.
Resetting the Thermostat
Resetting your Honeywell TH6110D1005 can resolve minor operational glitches or restore factory default settings. A simple reset involves cycling the power – remove the batteries for several minutes, or switch off the breaker supplying hardwired power. Reinsert the batteries or restore power to restart the thermostat.
For a more complete reset, accessing the thermostat’s menu (refer to the ‘Operating Instructions’ section) may offer a ‘Reset’ or ‘Factory Defaults’ option. This will erase any customized programming schedules and return the thermostat to its original configuration.

Advanced Settings
Explore configuring heat/cool stages, adjusting system settings, and understanding error codes for optimal performance. These settings allow for personalized control and troubleshooting.
Configuring Heat/Cool Stages
The Honeywell TH6110D1005 thermostat supports up to one heat and one cool stage, offering basic climate control functionality. Accessing these settings allows customization based on your HVAC system’s capabilities. To configure, navigate through the thermostat’s menu using the control buttons.
Within the advanced settings, locate the “System” or “Configuration” option. Here, you can define the type of heating and cooling system installed – forced air, heat pump, or others. Correctly identifying your system type is crucial for accurate operation.
Adjusting the stages involves setting temperature differentials and cycle rates. These parameters determine how frequently the heating or cooling system turns on and off, impacting comfort and energy efficiency. Refer to your HVAC system’s documentation for recommended settings. Incorrect configuration can lead to inefficient operation or discomfort. Always save changes after making adjustments.
Adjusting System Settings
The Honeywell TH6110D1005 allows for several system setting adjustments to optimize performance. Access these options through the thermostat’s menu, typically found under “Settings” or “Configuration.” Key settings include the temperature display format (Fahrenheit or Celsius) and the swing temperature, which controls the temperature range before the system cycles on or off.
Further customization includes setting a delay for compressor protection during cooling cycles, preventing short-cycling. You can also configure the thermostat to display the time in 12-hour or 24-hour format. Some models allow for filter change reminders, prompting maintenance for optimal air quality.
Carefully review each setting before modification, as incorrect adjustments can impact system efficiency and comfort. Refer to the thermostat’s display prompts and your HVAC system’s documentation for guidance. Remember to save any changes made to ensure they are implemented.
Understanding Error Codes
The Honeywell TH6110D1005 thermostat utilizes error codes to diagnose system malfunctions. These codes appear on the display, signaling issues with heating, cooling, or internal components. Common codes include those related to sensor failures, wiring problems, or communication errors with the HVAC system.
A “Low Battery” warning indicates the need for battery replacement, while codes referencing “Heat Call” or “Cool Call” suggest problems with the respective system’s operation. More complex codes may require professional HVAC technician assistance for accurate diagnosis and repair.
Consult the thermostat’s full manual or Honeywell’s online support resources for a comprehensive list of error codes and their corresponding solutions. Attempting repairs without proper knowledge can void warranties or cause further damage. Document the error code before contacting support for efficient troubleshooting.

Safety and Warranty Information
Always follow recycling and disposal instructions outlined in the manual. Honeywell International Inc. holds copyright, with patents pending, and offers warranty details for the TH6110D1005.
Recycling and Disposal Instructions
Responsible disposal of your Honeywell TH6110D1005 thermostat is crucial for environmental protection. This device contains electronic components and batteries that require special handling. Do not dispose of the thermostat with regular household waste.
Check local regulations for electronic waste recycling options in your area. Many communities offer designated drop-off locations or collection events for electronic devices. Contact your local waste management authority for specific guidelines.
Batteries should be removed and recycled separately. Most battery retailers offer battery recycling programs; Proper battery disposal prevents harmful chemicals from entering the environment.
Adhering to these instructions ensures compliance with environmental regulations and contributes to a sustainable future. Refer to the full manual for additional details and updates on disposal practices.
Warranty Details
Honeywell International Inc. warrants this Honeywell TH6110D1005 thermostat to be free from defects in material and workmanship for a period of one (1) year from the date of purchase. This warranty applies to normal residential use and does not cover damage resulting from misuse, abuse, or improper installation.
During the warranty period, Honeywell will, at its option, repair or replace a defective thermostat without charge. Proof of purchase, including the date of sale, is required to obtain warranty service. This warranty does not cover labor costs associated with installation or removal.
This warranty is void if the thermostat has been tampered with, altered, or if any unauthorized repairs have been attempted. For warranty claims or assistance, contact Honeywell customer support. See the complete warranty documentation included with your product for full terms and conditions.