How To Change a Honeywell Thermostat From Celsius to Fahrenheit?

The Honeywell thermostat is a reliable companion for maintaining a comfortable indoor environment, but sometimes, the default Celsius temperature settings may not align with your preferences or the measurement standards in your region. 

If you find yourself in this situation, you’re in the right place. In this comprehensive guide, we will walk you through the process of how to change a honeywell thermostat from celsius to fahrenheit.

Converting your Honeywell thermostat from Celsius to Fahrenheit might seem like a daunting task, but with our step-by-step instructions and helpful tips, you’ll be able to make this change effortlessly. 

Say goodbye to temperature confusion and hello to a thermostat that suits your needs perfectly.

How Your Honeywell Thermostat Works?

Before we delve into the intricacies of converting your Honeywell thermostat from Celsius to Fahrenheit, it’s crucial to familiarize yourself with the device. 

These thermostats are designed with precision and user-friendliness in mind. Here, we’ll break down the essential elements you need to know:

Display Screen

   – The display screen is your thermostat’s interface, where you can view and adjust settings.

   – It usually shows the current temperature and can switch between Celsius and Fahrenheit, depending on your preference.

Temperature Control Buttons

   – Most Honeywell thermostats feature buttons or a touchpad for temperature adjustments.

   – You can raise or lower the temperature, set heating and cooling modes, and access menu options through these controls.

Mode Selection

   – Honeywell thermostats typically offer various operating modes, including heating, cooling, and fan-only modes.

   – Understanding these modes is essential for setting your thermostat according to your comfort needs.

Programmable Features

   – Some Honeywell thermostats come with programmable features that allow you to schedule temperature changes throughout the day.

   – Learning how to program your thermostat can lead to energy savings and enhanced comfort.

Power Source

   – Identify whether your thermostat is battery-powered or connected to your home’s electrical system.

   – Knowing the power source helps ensure the thermostat remains operational.

Model Identification

   – Different Honeywell thermostat models may have unique features and interfaces.

   – It’s essential to determine your specific model to follow the correct conversion steps.

User Manual

   – Locate your thermostat’s user manual, as it provides valuable information on its operation and settings.

   – You can refer to the manual for model-specific instructions and troubleshooting guidance.

By grasping these fundamental aspects of your Honeywell thermostat, you’ll be better prepared to navigate its settings and make the necessary Celsius to Fahrenheit conversion with confidence.

how to change a Honeywell thermostat from Celsius to Fahrenheit – Step by Step Guide

Now that you’re well-acquainted with your Honeywell thermostat, it’s time to embark on the journey of converting it from Celsius to Fahrenheit. 

Follow these clear and straightforward steps to ensure a successful conversion:

1. Accessing the Settings

   – Begin by locating the thermostat’s settings menu. This is where you can make adjustments to various parameters.

   – Depending on your model, access might involve pressing a designated button, navigating through a digital menu, or using a touchscreen interface.

2. Selecting Temperature Units

   – Within the settings menu, look for an option related to temperature units. It’s typically labeled as a “Temperature Unit” or something similar.

   – When you find this option, select it to access the temperature unit settings.

3. Switching from Celsius to Fahrenheit

   – Once in the temperature unit settings, you’ll likely have the choice between Celsius and Fahrenheit.

   – Select “Fahrenheit” to make the conversion. Confirm your selection if prompted.

4. Confirming the Conversion

   – After selecting Fahrenheit, return to the main screen of your thermostat.

   – Verify that the temperature readings now displayed in Fahrenheit units. You should notice the change immediately.

   – To ensure accuracy, compare the thermostat’s reading with an external thermometer.

5. Troubleshooting Common Issues

   – If you encounter any issues during the conversion process, consult your thermostat’s user manual or the troubleshooting section for guidance.

   – Common issues may include difficulty accessing the settings menu or unexpected behavior after the conversion.

Please note that the specific steps may vary slightly depending on your Honeywell thermostat model. Always refer to your thermostat’s user manual for model-specific instructions and troubleshooting guidance.

Additional Tips for Using Fahrenheit Temperature in Honeywell Thermostat

Understanding the Fahrenheit Scale

   – Familiarize yourself with the Fahrenheit temperature scale if you’re not already accustomed to it. In Fahrenheit, freezing temperature is 32°F, while boiling is 212°F.

 – Knowing these reference points can help you gauge indoor temperatures more intuitively.

Setting Comfortable Temperatures

   – Adjust your thermostat to temperatures that align with your comfort preferences. A typical recommended setting for indoor comfort is around 68-72°F (20-22°C) in cool weather and slightly higher in warm weather.

Consider Energy Efficiency

   – Using Fahrenheit doesn’t mean sacrificing energy efficiency. Continue to set your thermostat to save energy when you’re away from home or during nighttime hours.

   – If your thermostat has programmable features, take advantage of them to automate temperature changes based on your daily schedule.

Monitoring Your HVAC System

   – Keep an eye on how your HVAC system responds to the new temperature settings. Ensure that it maintains a consistent and comfortable indoor climate.

   – If you notice any issues or irregularities in temperature control, consult your thermostat’s user manual or consider scheduling a maintenance check for your HVAC system.

Adapting to Local Climate

   – Adjust your thermostat settings based on the local climate conditions. For example, you may need different temperature settings during the winter months compared to the summer months.

Optimizing for Sleep

   – Experiment with nighttime temperature settings to find the ideal sleeping environment. Many people find slightly cooler temperatures conducive to restful sleep.

Regular Maintenance

   – Continue to perform regular maintenance on your thermostat, including dusting the display screen and ensuring it remains free from obstructions.

   – Change the thermostat’s batteries as needed if it’s battery-powered.

How to Maintain Your Honeywell Thermostat

Your Honeywell thermostat is a reliable companion for controlling your indoor climate, but like any device, it benefits from regular maintenance to ensure it performs at its best. 

Here are essential maintenance practices to keep your thermostat in optimal working condition:

Dust and Clean the Display Screen

   – Over time, dust and dirt can accumulate on the thermostat’s display screen, making it less clear and responsive. Periodically, gently clean the screen with a soft, lint-free cloth to maintain visibility and functionality.

Check for Obstructions

   – Ensure that there are no obstructions near the thermostat that could affect its temperature readings. Objects like curtains, furniture, or electronic devices placed too close to the thermostat can interfere with its accuracy.

Battery Replacement

   – If your thermostat is battery-powered, check the battery status indicator regularly. When the battery is low, replace it promptly to prevent interruptions in thermostat operation.

Verify Temperature Accuracy

   – Periodically, compare the thermostat’s temperature reading with an external thermometer to confirm its accuracy. If you notice significant discrepancies, consider recalibrating the thermostat or seeking professional assistance.

Update Firmware (If Available)

   – Some Honeywell thermostats can receive firmware updates to improve performance and add new features. Check the manufacturer’s website or user manual for information on updating your thermostat’s firmware.

Scheduled Maintenance

   – Consider scheduling annual or bi-annual HVAC system maintenance to ensure both your thermostat and heating/cooling system are operating efficiently.

   – During maintenance visits, HVAC professionals can also calibrate your thermostat for optimal performance.

Secure the Thermostat

   – Ensure that the thermostat is securely attached to its base or mounting plate. Loose connections can affect its functionality and accuracy.

How to Change a Honeywell Thermostat from Fahrenheit to Celsius

Step 1: Locate Your Thermostat Model

Different Honeywell thermostat models may have slightly different menu options and button configurations. Start by identifying your specific model, as the process for changing temperature units may vary.

Step 2: Access the Menu

To begin, access the thermostat’s menu. Typically, this involves pressing the menu button, which is often represented by a symbol such as “MENU” or “SETTINGS” on the thermostat’s display screen.

Step 3: Navigate to Temperature Units

Using the arrow keys or touchscreen, navigate through the menu until you find the “Temperature Units” or a similar option. It’s usually located under the “Settings” or “Preferences” section.

Step 4: Select Celsius

Once you’ve highlighted the “Temperature Units” option, select it by pressing the appropriate button or tapping the touchscreen. 

You will then be presented with a choice between Fahrenheit and Celsius. Choose “Celsius” and confirm your selection.

Step 5: Save Your Settings

After selecting Celsius, save your changes by following the on-screen instructions. 

This usually involves pressing a “Save” or “Done” button. Your thermostat will now display temperatures in Celsius.

Step 6: Verify the Change

To ensure the change has been successful, check the thermostat’s display. It should now show temperatures in Celsius degrees. If the conversion was successful, you’re all set!

Frequently Asked Questions (FAQs)

Do all Honeywell thermostat models have the same conversion process?

No, the conversion process may vary slightly depending on your thermostat model. Always consult your thermostat’s user manual for model-specific instructions.

Will converting my thermostat affect its performance or accuracy?

Converting the temperature scale on your thermostat should not impact its performance or accuracy. However, it’s essential to confirm that the thermostat displays temperatures correctly after the conversion.

Can I convert my Honeywell thermostat to a smart thermostat model?

Yes, you can typically convert the temperature units on smart thermostat models as well. Check your thermostat’s mobile app or online dashboard for conversion options.

What if I encounter issues during the conversion process?

If you experience difficulties or unexpected issues while converting your thermostat, refer to your user manual for troubleshooting guidance. You can also contact Honeywell customer support for assistance.

Can I program my Honeywell thermostat after converting it to Fahrenheit?

Yes, you can still utilize programmable features on your thermostat after converting it to Fahrenheit. Programming allows you to set temperature schedules for energy efficiency and comfort.


Congratulations, you’ve successfully mastered the art of how to change a honeywell thermostat from celsius to fahrenheit.

This guide has taken you through every step of the process, from understanding your thermostat’s components to preparing for the conversion, and finally, making the switch to the Fahrenheit scale.

With your newly configured thermostat, you have the power to create a comfortable and energy-efficient home environment. Adjust your settings to match your comfort needs and take advantage of programmable features to save energy while you’re away.

If you ever need to switch back to Celsius or encounter any issues, remember that your thermostat is a versatile tool designed to meet your needs. Consult your user manual or reach out to Honeywell’s customer support for assistance.

Thank you for choosing this guide as your trusted resource for mastering the Honeywell thermostat Celsius to Fahrenheit conversion.

Scott Maupin