What does Error Code EE mean on a Blue Star AC?

Error Code EE on a Blue Star Air Conditioner indicates an 'EEPROM Error'. This means the non-volatile memory chip on the PCB, which holds the AC's operating software and settings, has been corrupted or physically damaged.

Why does EE error happen?

The most common cause is a sudden Voltage Surge or Lightning Strike. A spike in electricity can scramble the data inside the EEPROM chip or burn the chip itself, leaving the AC 'brain dead'.

Can I fix Blue Star EE error by resetting?

Sometimes. A 'Hard Reset' (turning off the MCB for 10-15 minutes) can occasionally clear a temporary memory glitch. If the error returns immediately after power-on, the PCB requires professional repair or replacement.

Technician Note

Always isolate power before inspecting high-voltage components.

Blue Star AC Error Code EE | EEPROM Error | Atlas Aircon

Memory / Software Failure

Blue Star Error EE

EEPROM Corruption.
The System has Lost its Operating Logic.

Primary Cause

Voltage Surge

Component

EEPROM Chip

Fix

PCB Program/Replace

The “Brain Dead” Scenario

The EE Error stands for EEPROM (Electrically Erasable Programmable Read-Only Memory). This tiny 8-legged chip on your PCB holds the “personality” of your AC—it remembers model details, fan speeds, and compressor logic.

Why it fails: Unlike sensors that wear out, the EEPROM usually dies due to a Voltage Spike (Lightning or Grid fluctuation). The surge scrambles the data inside, leaving the AC confused and unable to start.

1 User Level Checks

The Hard Reset

Turn off the main MCB switch. Wait for 15 minutes. This drains residual power from the PCB and might reset a “stuck” logic loop.

Stabilizer Check

Is your stabilizer showing “Hi-Cut” or “Lo-Cut”? Unstable voltage can cause the EEPROM to misread data, triggering a temporary EE error.

Moisture / Bugs

Sometimes, a lizard or moisture on the PCB tracks near the memory chip can short the data lines. This needs professional cleaning.

Atlas Aircon Repair Protocol

How we handle PCB Logic Failure:

01.
EEPROM Re-Seating On some older models, the memory chip is removable (socketed). We remove it, clean the legs, and re-insert it. This fixes loose Contact issues.
02.
Chip Reprogramming / Replacement We unsolder the corrupted chip and solder a new, pre-programmed EEPROM chip specific to your AC model. This is a specialized repair.
03.
Full PCB Replacement If the main microcontroller is also damaged by the surge (or if new EEPROMs don’t work), the entire PCB must be replaced.

Estimated Repair Cost (Atlas Aircon)

IC Reprogramming: ₹1,200 – ₹1,800

New PCB: ₹4,500+

Frequently Asked Questions

Can I prevent EE error?

Yes. Since EE errors are almost always caused by voltage surges, installing a high-quality voltage stabilizer with **Surge Protection** is the best defense.

Is the outdoor or indoor PCB faulty?

Usually, the **EE** code on the Indoor display refers to the **Indoor PCB’s** memory. However, some advanced Inverter models may display EE to indicate a communication mismatch caused by the Outdoor PCB. A technician checks both.

Why does it cost so much if it’s just a small chip?

The chip itself is cheap, but the *software* inside it is proprietary to Blue Star. Technicians charge for the expertise, the specialized programming tools, and the risk involved in micro-soldering on a sensitive board.