Samsung Air Conditioner Error Code E606

E606 indicates a communication error between the CAUR board and the relay module inside the air conditioner. This means the two components cannot exchange control signals properly, which causes the unit to stop normal operation. It is an internal control system fault that requires inspection of the wiring and control boards.

No, you should not continue operating the unit while E606 is active. The error indicates that a key communication link in the control system has failed, and running the system in this state could lead to uncontrolled operation of components or additional damage. Power off the unit and have it inspected before resuming use.

Repair costs vary depending on the root cause. If the fix is simply reseating a loose connector, a service call fee of roughly 75 to 150 dollars may cover it. If the CAUR board or relay module needs replacement, parts and labor together can range from 200 to 600 dollars or more, depending on the unit model and local labor rates.

Some causes, such as a loose wiring connector, can be addressed by a knowledgeable DIYer who is comfortable working inside the unit with the power fully disconnected. However, diagnosing and replacing the CAUR board or relay module involves working with internal electronics and should be handled by a qualified technician. Attempting repairs without proper knowledge risks further damage or electric shock.

A power reset may temporarily clear the error display, but it will not resolve the underlying communication fault. If the wiring connection or board issue is still present, the E606 code will return once the unit attempts to resume normal operation. A proper diagnosis and repair of the root cause is necessary for a lasting fix.