E5Samsung Air Conditioner

Samsung Air Conditioner Error E5 – Meaning, Causes & How to Fix

Communication error between indoor and outdoor units – the two units cannot exchange data over the communication wiring.

High Severity

Low

Medium

High

Critical

Expert Verified

Reviewed by a Certified Electrical Engineer & Licensed Technician

Official Meaning

Communication error between indoor and outdoor units – the two units cannot exchange data over the communication wiring.

Real-World Causes

1Refrigerant leak or low charge
2Compressor failure or overload
3Fan motor failure (indoor or outdoor unit)
4Frozen evaporator coil
5Capacitor failure
6Thermistor or temperature sensor fault
7Control board or communication error

Symptoms

Look for these signs to confirm error E5 on your Samsung Air Conditioner:

Unit not cooling or heating effectively
Ice forming on indoor or outdoor unit
Unusual noises from compressor or fan
Water leaking from indoor unit
Unit short cycling (turning on and off frequently)
Error code displayed on unit or remote

DIY Fix (Safe)

1Clean or replace the air filter (check monthly)
2Check thermostat settings and battery
3Clear debris and obstructions around the outdoor unit
4Ensure all vents and registers are open and unblocked
5Reset the unit by switching off at the breaker for 5 minutes
6Check that the condensate drain line is not clogged

Professional Action Required

1Check refrigerant levels and inspect for leaks
2Test compressor and capacitor with proper equipment
3Inspect indoor and outdoor fan motors
4Clean evaporator and condenser coils thoroughly
5Check electrical connections and control board

Additional Context

Operating Mode

Error may occur in cooling, heating, or auto mode

Ambient Temp

Extreme outdoor temperatures can affect unit performance

Sensor Issues

Thermistor faults may cause incorrect temperature readings

Frequently Asked Questions

What does Samsung Air Conditioner error E5 mean?

Communication error between indoor and outdoor units – the two units cannot exchange data over the communication wiring.

What causes Samsung Air Conditioner E5 error?

Common causes include: Refrigerant leak or low charge. Compressor failure or overload. Fan motor failure (indoor or outdoor unit). Refrigerant and airflow issues are the most common air conditioner problems.

How do I fix Samsung Air Conditioner error E5?

Start with these steps: Clean or replace the air filter (check monthly). Check thermostat settings and battery. If the error persists, contact an HVAC technician to inspect the refrigerant system and electrical components.

Related Error Codes

Other Samsung Air Conditioner Errors

E1Indoor temperature sensor error – the room temperature sensor (thermistor) in the indoor unit is malfunctioning or disconnected

E2Indoor evaporator coil temperature sensor error – the sensor monitoring the evaporator (cooling coil) temperature is malfunctioning