Voltas window ACs are known for their reliable performance and durability. However, like all modern appliances, they come equipped with a self-diagnosis system that displays error codes when something goes wrong. These codes help users and technicians quickly identify the problem and take the right steps to fix it.

In this blog, we’ll go through the most common Voltas window AC error codes, explain what they mean, and share solutions you can try at home or with the help of a technician.

🔍 Voltas Window AC Error Code List (With Descriptions & Solutions)

E1 – Indoor/Outdoor Unit Communication Error

• Description: This error typically appears in inverter window ACs with communication between internal components.
• Solution:
  • Turn off the AC and restart it after a few minutes.
  • Check for any loose wiring connections inside the unit.
  • If the issue persists, the main control board may need inspection or replacement.

E2 – Zero Crossing Detection Error

• Description: The AC is having trouble detecting the electrical frequency signal properly.
• Solution:
  • Restart the unit and check if the error clears.
  • Inspect the power supply for fluctuations.
  • If repeated, contact a technician to check the PCB.

E3 – Fan Speed Error

• Description: The internal fan speed is out of range or the fan isn’t functioning properly.
• Solution:
  • Clean dust or debris around the fan.
  • Check if the fan motor is running smoothly.
  • Replace the fan motor if defective.

E4 – Room Temperature Sensor Error

• Description: The sensor that detects room temperature is malfunctioning or disconnected.
• Solution:
  • Check sensor wiring inside the unit.
  • Replace the room temperature sensor if it’s damaged.

E5 – Evaporator Coil Sensor Error

• Description: The sensor on the evaporator coil is not working.
• Solution:
  • Inspect the evaporator coil and sensor wire.
  • Replace the sensor if found faulty.

E6 – Condenser Coil Temperature Sensor Error

• Description: Sensor at the outdoor coil (in hybrid window ACs) is not functioning.
• Solution:
  • Make sure the sensor is properly attached and the wire isn’t damaged.
  • Replace the condenser sensor if needed.

E7 – Compressor Overload / High Temperature

• Description: The compressor is overheating or overloaded due to high pressure.
• Solution:
  • Turn off the AC for 20–30 minutes to let it cool.
  • Ensure proper ventilation around the back side (outdoor) of the unit.
  • If the issue persists, a technician should inspect the compressor.

E8 – Water Drainage Issue / Overflow

• Description: Indicates water drainage is blocked or the AC is accumulating water internally.
• Solution:
  • Clean the drainage holes at the rear of the unit.
  • Tilt the AC slightly backward for proper flow.
  • Ensure no blockages are in the tray or pipe.

E9 – EEPROM / Memory Error

• Description: A fault in the AC’s memory chip (EEPROM).
• Solution:
  • Try a hard reset by turning off power completely for a few minutes.
  • If not resolved, PCB replacement may be required.

🧽 Preventive Tips to Avoid Errors in Voltas Window AC

• ✅ Clean the air filters every 15 days.
• ⚡ Use a stabilizer to prevent voltage-related damage.
• 🧰 Schedule professional servicing once a year.
• 🌬️ Don’t block air vents or back side of the AC.
• 🚫 Don’t ignore unusual noises, water leaks, or blinking lights.

📞 When to Call a Technician

You should contact Voltas support or a certified AC technician if:

• The same error code reappears frequently.
• The unit is not cooling efficiently.
• There’s a burning smell or electrical issue.
• You’re unsure how to check or replace a sensor or motor.

✅ Final Thoughts

Understanding the Voltas window AC error code list can help you diagnose common problems early and take appropriate action. While simple maintenance tasks like cleaning and checking drainage can be done at home, technical issues should always be handled by professionals.

Need a service? Contact Voltas customer care or your nearest authorized technician to fix errors quickly and efficiently.

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