1. Introduction
Thank you for choosing the Blue Star 0.8 Ton 2 Star Window Air Conditioner, model WFA209LXU. This manual provides essential information for the safe and efficient operation, installation, and maintenance of your new air conditioner. Please read this manual thoroughly before using the appliance and retain it for future reference.
2. Safety Information
Always observe the following basic precautions to reduce the risk of fire, electric shock, or injury:
- Ensure the power supply matches the specifications of the unit.
- Do not operate the AC with wet hands or when standing on a wet surface.
- Never insert objects into the air outlet or inlet.
- Do not attempt to repair or modify the unit yourself. Contact qualified service personnel.
- Keep flammable materials away from the unit.
- Ensure proper grounding to prevent electric shock.
3. Product Overview
The Blue Star WFA209LXU is a 0.8 Ton 2 Star Window AC designed for small rooms up to 110 sq.ft. It features a high energy-efficient rotary compressor and uses R-32 eco-friendly refrigerant. Key features include:
- Turbo Cool: For rapid cooling.
- Comfort Sleep: Adjusts operation for optimal sleep comfort.
- Humidity Control (Dry Mode): Reduces excess moisture in the air.
- Auto Re-start with Memory: Resumes previous settings after power cuts.
- Self Diagnosis: Alerts users to operational faults with error codes.
- Anti Corrosive Blue Fins: Enhances durability and cooling performance.
- 2-Way Air Swing: Ensures even air distribution.

Image 1: Overview of the Blue Star Window AC highlighting features like Rotary Compressor, R32 Refrigerant, 52°C Ambient Cooling, 100% Copper Condenser, Annual Consumption, Room Size Suitability, Dust Filter, Turbo Cool, and Anti-Corrosive Blue Fins.

Image 2: The Blue Star Window AC showcasing its Power Savings Guide (ISEER 3.15), R32 Eco-Friendly Refrigerant, Energy Saver function, 100% Copper Condenser, and Self Diagnosis feature.
4. Setup and Installation
This is a window-mounted air conditioner. Proper installation is crucial for optimal performance and safety. It is highly recommended to have the unit installed by a qualified technician.
4.1 Pre-Installation Check
- Ensure the window opening is suitable for the unit's dimensions.
- Verify the electrical outlet meets the power requirements.
- Confirm the window frame and surrounding structure can support the unit's weight (approximately 37.4 kg).
4.2 Dimensions
The physical dimensions of the unit are:
- Depth: 57.8 cm
- Width: 56 cm
- Height: 37.5 cm

Image 3: The Blue Star Window AC with its dimensions (57.8 cm D x 56 cm W x 37.5 cm H) and the included remote control.
4.3 Included Components
The product package includes:
- 1 x Blue Star Window AC Unit
- 1 x Remote Control
- 1 x Instruction Manual with Warranty Card
5. Operating Instructions
Your Blue Star Window AC comes with a remote control for convenient operation. Familiarize yourself with the remote's buttons and functions.
5.1 Basic Operation
- Power On/Off: Press the power button on the remote to turn the unit on or off.
- Mode Selection: Use the 'Mode' button to cycle through cooling, fan, and dry modes.
- Temperature Adjustment: Use the '+' and '-' buttons to set your desired temperature.
- Fan Speed: Adjust the fan speed (low, medium, high) using the 'Fan' button.
5.2 Special Features
- Turbo Cool: Activate this pre-set mode for instant maximum cooling, ideal for quickly lowering room temperature during hot weather.
- Comfort Sleep: This intelligent feature automatically adjusts the AC's operation to provide optimal cooling comfort throughout the night, ensuring undisturbed sleep.
- Humidity Control (Dry Mode): In humid conditions, select the Dry Mode to remove excess moisture from the indoor air, making the room feel cooler and more comfortable without significant temperature drops.
- Auto Re-start with Memory: In case of a power outage, the AC will automatically restart with the last set operating mode and temperature once power is restored.
- 2-Way Air Swing: The unit features a 2-way air swing function to distribute cool air evenly across the room.

Image 4: The Blue Star Window AC highlighting Comfort Sleep, Humidity Control, and Auto-Restart with Memory features.
6. Maintenance
Regular maintenance ensures the longevity and efficient operation of your air conditioner.
6.1 Air Filter Cleaning
- Turn off the AC and disconnect power before cleaning.
- Remove the front panel and carefully slide out the air filters.
- Clean the filters with a vacuum cleaner or wash them with lukewarm water and mild detergent.
- Rinse thoroughly and allow them to dry completely before re-installing.
- Clean filters every two weeks or more frequently if the unit is used often or in dusty environments.
6.2 Exterior Cleaning
- Wipe the exterior of the unit with a soft, damp cloth.
- Do not use harsh chemicals, abrasives, or solvents.
6.3 Blue Fins
The unit is equipped with Anti Corrosive Blue Fins, which resist water and dust deposit, contributing to unhindered cooling performance and enhanced durability. While these fins offer protection, periodic professional cleaning of the coils is still recommended.
7. Troubleshooting
If your AC is not operating correctly, refer to the following common issues before contacting customer service.
7.1 Self Diagnosis Feature
The AC's Self Diagnosis feature alerts you to operational faults by displaying an error code. Note down the error code and refer to the troubleshooting section in the full manual (if provided separately) or contact customer support with the code for faster resolution.
7.2 Common Issues
- AC not turning on: Check power supply, circuit breaker, and ensure the remote control batteries are not depleted.
- Insufficient cooling: Clean air filters, ensure no obstructions to airflow, check if windows/doors are closed, and verify temperature settings.
- Unusual noise: Ensure the unit is securely installed. If the noise persists or is excessive, contact service.
- Water leakage: Check for proper drainage and ensure the unit is level.
For issues not resolved by these steps, contact Blue Star customer support.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Blue Star |
| Model Name | WFA209LXU |
| Capacity | 0.8 Tons |
| Cooling Power | 2.49 Kilowatts (2490 Watts) |
| Energy Rating | 2 Star (as per new BEE guidelines effective from 1st Jan 2026) |
| ISEER Value | 3.15 |
| Annual Energy Consumption | 611.54 Kilowatt Hours Per Year |
| Refrigerant | R-32 |
| Compressor Type | Rotary |
| Noise Level | 56 Decibels |
| Product Dimensions (D x W x H) | 57.8D x 56W x 37.5H Centimeters |
| Item Weight | 37.4 Kilograms (37400 Grams) |
| Voltage | 230 Volts |
| Room Type Suitability | Small Room (up to 110 sq.ft) |
| Special Features | Comfort Sleep, Energy Saver, High Energy Efficient Rotary Compressor, Humidity Control (Dry Mode), Turbo Cool, Self Diagnosis, Anti Corrosive Blue Fins, 2-Way Air Swing |
| Installation Type | Window |
| Control Method | Remote Control |
9. Warranty Information
Your Blue Star Window AC (WFA209LXU) comes with the following manufacturer's warranty:
- Product Warranty: 1 Year on the entire product.
- Compressor Warranty: 5 Years on the Fixed Speed Compressor.
Coverage Details: The warranty comprehensively covers all repairs, rectification, or replacement of components such as the Electronic PCB, IDU Evaporating Coil, and ODU Condenser Coil.
Exclusions: The warranty excludes all types of air filters, plastic and metal parts, the remote handset, and gas charging. Gas charging associated with the Compressor/Evaporator/Condenser coil will be paid by the customer. This warranty applies to residential usage only. Terms and conditions apply.
10. Customer Support
For any queries, service requests, or technical assistance, please contact Blue Star customer care:
- 24x7 Customer Care: (+91) 89 76 781177
- SMS Service: Send "Service" or "Cool" to 57575
Manufacturer Contact Information: BLUE STAR LIMITED, KASTURI BUILDINGS, MOHAN T ADVANI CHOWK, JAMSHEDJI TATA ROAD, CHURCHGATE, MUMBAI 400 020.

Image 5: Map illustrating Blue Star's service network across India, along with customer care contact number (+91 89 76 781177) and SMS service details (SMS "Service" or "Cool" to 57575).


