Blue Star Air Conditioner

Blue Star AC E9 error

Memory (EEPROM) error — control board

Needs a technicianReported by one source — verify

Try a reset once. If it comes back, a trained technician should repair it.

We found this meaning in only one secondary source. Confirm it with your user manual or brand customer care before any repair.

What it means

The control board cannot read its saved settings from its memory chip (EEPROM). This is an electronic fault on the board.

Common causes

Power surge or lightning
Data corrupted after a power cut
Faulty memory chip or control board

Try this at home first

Tick each step as you go

Switch off at the MCB for 10 minutes and restart once

When to call a technician

If the code stays, the control board must be repaired or replaced by an authorised technician.

Safety first

Always switch off at the wall socket or MCB before touching any part. Do not open the outdoor unit, control boards or gas pipes yourself — they carry high voltage and pressure.

Frequently asked questions

What does E9 mean on a Blue Star Air Conditioner?

Memory (EEPROM) error — control board. The control board cannot read its saved settings from its memory chip (EEPROM). This is an electronic fault on the board.

Can I fix Blue Star Air Conditioner error E9 myself?

You can try a reset first: Switch off at the MCB for 10 minutes and restart once. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with E9?

Avoid repeated restarts; running with this fault can cause more damage.

Other Blue Star AC codes

All Blue Star Air Conditioner error codes

Same code on other brands

E9 High pressure / overload protectionHaier AC E9 Drain / water overflow protectionGree AC E9 Water leak detectedIFB Washing Machine E09 Heating faultBosch Dishwasher

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20