Fujitsu Thermostat Symbols (Explained) In 2025

Fujitsu thermostats are known for their efficiency and user-friendly interface. However, the symbols on the display can sometimes be confusing, especially if you’re unfamiliar with their meanings.

In this guide, we’ll break down all the Fujitsu thermostat symbols, what they represent, and how to use them effectively.

Understanding Fujitsu Thermostat Symbols

Fujitsu thermostats use a variety of symbols to indicate different modes, functions, and settings. These icons help users quickly understand the current operation of their heating or cooling system.

Common Fujitsu Thermostat Symbols and Their Meanings

Below are some of the most commonly found symbols on a Fujitsu thermostat:

1. Power Symbol (🔴 or 🟢)

• A red power symbol typically means the system is on.
• A green power symbol indicates that the system is running in energy-saving mode.

2. Mode Symbols

The mode symbols determine whether the unit is heating, cooling, or performing another function.

• 🌡️ Heat Mode (Sun Symbol ☀️) – Activates heating mode. The thermostat will maintain the set temperature by providing warm air.
• ❄️ Cool Mode (Snowflake Symbol ❄️) – Turns on cooling mode. The system will work to lower the room temperature.
• 💨 Fan Mode (Fan Symbol 🌬️) – The system will circulate air without heating or cooling.
• 💦 Dry Mode (Droplet Symbol 💧) – Dehumidifies the room without cooling too much.
• 🔁 Auto Mode (Circular Arrows 🔄) – The thermostat automatically switches between heating and cooling based on room temperature.

3. Temperature Adjustment Symbols (▲/▼)

• The up (▲) and down (▼) arrows allow you to increase or decrease the temperature.

4. Fan Speed Symbols

• 🚀 High Speed (Three Curved Lines) – Maximum airflow for quick cooling or heating.
• 💨 Medium Speed (Two Curved Lines) – Balanced airflow.
• 🌬️ Low Speed (One Curved Line) – Energy-efficient and quieter operation.
• 🔄 Auto Fan Mode – The system adjusts fan speed based on room conditions.

5. Timer Symbols (⏳ or 🕒)

• Timer On (⏳) – The unit is scheduled to turn on at a specific time.
• Timer Off (🕒) – The system is set to shut off at a certain time.

6. Sleep Mode Symbol (🌙)

• Reduces energy consumption by gradually adjusting the temperature for comfortable sleeping conditions.

7. Error or Warning Symbols (⚠️ or 🔧)

• ⚠️ Warning Sign – Indicates a system issue that requires attention.
• 🔧 Maintenance Symbol – Suggests a service or filter cleaning is needed.

How to Use Fujitsu Thermostat Symbols Effectively

• Set the right mode: Ensure you choose the correct operation mode (heat, cool, fan, dry, or auto).
• Adjust the fan speed: Use higher speeds for quick cooling/heating and lower speeds for efficiency.
• Utilize the timer function: Automate your thermostat for better energy management.
• Check for error symbols: If you see a warning or maintenance symbol, refer to the manual or contact a technician.

Troubleshooting Fujitsu Thermostat Symbols

If the thermostat displays unfamiliar symbols or an error code, try these steps:

1. Reset the Thermostat – Turn off the unit and restart it.
2. Check the User Manual – Look for explanations of error codes.
3. Inspect the Filters – Dirty filters can trigger maintenance warnings.
4. Call a Professional – If the issue persists, consult a technician.

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Conclusion

In Conclusion, Understanding Fujitsu thermostat symbols is essential for efficiently managing your HVAC system. Whether it’s heating, cooling, or troubleshooting, recognizing these symbols will help you operate your thermostat effectively.

If you ever see an unfamiliar symbol, refer to this guide or consult your user manual for further details.