Lloyd Air Conditioner

Lloyd AC E4 error

Outdoor air temperature sensor fault

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 is getting a wrong reading, or no reading, from the outdoor air 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 E4 mean on a Lloyd Air Conditioner?

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

Can I fix Lloyd Air Conditioner error E4 myself?

You can try a reset first: Switch off at the wall socket or MCB for 5 minutes, then restart. If the code returns, call a technician.

Is it safe to keep using the Air Conditioner with E4?

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

Other Lloyd AC codes

E1 Indoor room temperature sensor fault E2 Indoor coil (evaporator) temperature sensor fault E3 Compressor start / rotation fault

All Lloyd Air Conditioner error codes

Same code on other brands

E4 Compressor overheating / High pressure / overload protection / Indoor room temperature sensor faultVoltas AC E4 High pressure / overload protection / Compressor overheating / Indoor fan motor fault / Drain / water overflow protectionBlue Star AC E4 Memory (EEPROM) error — indoor unit boardHaier AC E4 Compressor overheatingGree AC FE Too much water (overflow)LG Washing Machine E-02 Cooking time set too longSamsung Microwave E4 Door / lid not closed or not locking / Too much water (overflow)IFB Washing Machine E4 Unbalanced load / Door / lid not closed or not lockingGodrej Washing Machine E01 Control board (PCB) faultBosch Dishwasher

Sources

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

ApplianceFaults.in — Lloyd air conditioner

Last checked: 2026-10-20