Blue Star Air Conditioner

Blue Star AC E7 error

Indoor fan motor fault / Indoor/outdoor mismatch or wrong wiring / Compressor discharge temperature sensor fault

Needs a technicianReported by one source — verify

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

Meaning depends on your model

Possible meaning 1Indoor fan motor fault

Needs a technician

The indoor blower fan is not turning at the right speed, or its speed signal is missing.

Common causes

Blower jammed by dirt or a loose part
Faulty indoor fan motor or capacitor
Loose motor plug or faulty control board

Try this at home first

Tick each step as you go

Switch off, wait 5 minutes and restart
Clean the filters; with power OFF, check nothing is blocking the blower

When to call a technician

If it repeats, a technician must test the motor, capacitor and board.

Possible meaning 2Indoor/outdoor mismatch or wrong wiring

Needs a technician

The indoor and outdoor units don’t match each other or are wired incorrectly.

Common causes

Wrong indoor/outdoor combination
Connecting wires swapped
Wrong board setting after a repair

Try this at home first

Tick each step as you go

If the AC was just installed or repaired, contact the installer

When to call a technician

An authorised technician must check the model combination and wiring.

Possible meaning 3Compressor discharge temperature sensor fault

Needs a technician

The control board is getting a wrong reading, or no reading, from the compressor discharge temperature sensor. Usually the sensor, its wire or its plug is loose, damaged or has failed.

Common causes

Loose or rusted sensor plug on the control board
Sensor wire cut, pinched or bitten by rats
Sensor has failed (open or short circuit)
Less often, a fault on the control board

Try this at home first

Tick each step as you go

Switch off at the wall socket or MCB for 5 minutes, then restart
If the code does not come back, no further action is needed
Look for any visible wire damage from outside — do not open covers

When to call a technician

If the code returns after a reset, a technician needs to test and usually replace the sensor. It is a common, low-cost repair.

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 E7 mean on a Blue Star Air Conditioner?

Different Blue Star models use this code for different faults. The most commonly reported meanings are below. Check the model number on the sticker of your unit and your user manual to know which one applies. Indoor fan motor fault / Indoor/outdoor mismatch or wrong wiring / Compressor discharge temperature sensor fault.

Can I fix Blue Star Air Conditioner error E7 myself?

You can try a reset first: Switch off, wait 5 minutes and restart. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with E7?

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

E7 Heater temperature sensor faultSamsung AC E7 Outdoor fan motor faultDaikin AC E7 Communication error (indoor ↔ outdoor unit)Haier AC E7 Mode conflict (multi-split)Gree AC

Sources

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

Last checked: 2026-10-20