Samsung Air Conditioner Error Code E607

E607 indicates a communication error between the DMS (Demand Management System) module and the CAUR (Central Autonomous Unit Receiver) module. This fault means the two control modules are unable to exchange data properly. It is commonly caused by wiring faults, connector corrosion, or a failed control board in either module.

A power reset may temporarily clear the error display, but if the underlying communication fault still exists, the E607 code will return once the system restarts and attempts communication between the modules. A reset is useful for confirming whether the fault is intermittent, but it does not substitute for proper diagnosis and repair.

Repair costs vary depending on the root cause. If the fix involves reseating a connector or replacing a wiring harness, costs are generally in the range of $75 to $200 for a service call and labor. If a DMS or CAUR control board needs to be replaced, total costs including parts and labor can range from $250 to $600 or more depending on the specific model and part availability.

Some basic checks, such as inspecting visible wiring and reseating connectors, can be performed by a knowledgeable DIYer. However, diagnosing a failed DMS or CAUR board and replacing those components typically requires familiarity with HVAC control systems and access to the appropriate replacement parts. For most homeowners, this repair is best handled by a certified technician.

Continuing to operate the system with an active E607 fault is not recommended. The communication breakdown between the DMS and CAUR modules can lead to uncoordinated system behavior or prevent the unit from responding correctly to demand and control signals. Shutting the system down until the fault is resolved is the safer course of action.