Air Conditioner Samsung Updated Jul 8, 2026

Samsung AC E6 Error — Outdoor Heat Exchanger Sensor Fault Explained

E6 Samsung · Air ConditionerE6 on a Samsung AC indicates a defective outdoor heat exchanger sensor (open or short). Th…

Quick answer

E6 on a Samsung AC indicates a defective outdoor heat exchanger sensor (open or short). The sensor needs checking or replacing.

What does the E6 code mean?

E6 shows that the outdoor heat exchanger sensor has failed. It tracks the outdoor coil temperature; an open or shorted reading triggers E6 and stops the unit to protect the system.

Common causes

Faulty outdoor heat exchanger sensor
Loose or corroded connector at the outdoor PCB
Water or insect damage to outdoor wiring

How to fix the E6 error

Power off

Isolate the unit at the breaker.

Open the outdoor unit

Remove the cover and locate the heat exchanger sensor connector.

Reseat and inspect

Reconnect and check for corrosion, moisture or loose pins.

Test the sensor

Measure resistance; open or shorted means replace.

Replace and reset

Fit a matching sensor and confirm E6 has cleared.

Safety first: The outdoor unit carries mains voltage and refrigerant lines. If you are unsure, or the code returns, use an authorised Samsung technician.

Part you may need: Outdoor heat exchanger sensor

Order the correct sensor for your outdoor model number.

Frequently asked questions

Why does E6 stop the AC?

The unit cannot read the outdoor coil temperature safely, so it stops to avoid damage.

Written by

REZAUL Karim (Riad)

REZAUL Karim (Riad) is the founder of ErrFixHub and a hands-on electronics and home-appliance repair specialist with over 15 years of experience diagnosing and fixing air conditioners, washing machines, refrigerators, inverters and other household appliances. He built ErrFixHub to turn cryptic error codes into clear, step-by-step fixes anyone can follow — cross-checking every code against manufacturer documentation and real repair-bench experience.