Blue Star AC error codes: meaning, diagnosis and PCB parts
Blue Star is a major air conditioner brand in India, widely used in homes and commercial buildings. A Blue Star AC that shows an error code or blinking LEDs is reporting a specific fault. This guide decodes the most common Blue Star codes and points to the parts usually involved, including the control board.
How to read a Blue Star error code
The code shows on the indoor display or as LED blinks.
- Note the exact code or count the LED blinks
- Tell an indoor fault from an outdoor (ODU) fault
- Note when it appears (at start, in cooling, after a few minutes)
- One code can have several causes: measurement confirms the diagnosis
Most common Blue Star codes
Typical Blue Star codes include E6, L4 and LC. They map to the main functions the board monitors.
Always check connectors and terminal tightness before replacing a part: a loose contact triggers misleading codes.
- Temperature sensor fault: room, indoor coil or outdoor coil
- Indoor-outdoor communication fault: wiring or board
- Compressor protection: high/low pressure, overcurrent
- Fan motor or inverter power module fault
When the control board (PCB) is the cause
Some persistent faults point straight to the main or power board.
- Communication error after cables checked: indoor or outdoor board
- No response despite power present: main board suspect
- Recurring inverter fault: power module or outdoor board
- Burnt smell or scorched component: board replacement needed
Finding the right Blue Star part
Replacement needs the exact reference of the faulty part.
- Read the reference printed on the board or component
- Note the full model and serial number
- Tell sensor, fan, capacitor and board apart to avoid over-ordering
- Prefer a tested refurbished board when new is unavailable
En résumé
A Blue Star error code is not a dead end: decoded well, it points to the sensor, communication, compressor or control board. When the board is at fault, identifying it by its exact reference avoids ordering mistakes. CLIMAPARTS supplies new and refurbished, tested AC control boards and ships internationally, including India.
Outils recommandés pour cette intervention
Amazon.fr · Liens affiliésEn tant que Partenaire Amazon, CLIMAPARTS peut percevoir une commission sur les achats éligibles, sans surcoût pour vous.