Display alternates between the normal screen and a “Service” or “Call for Service” message.

Safety: This is an advisory message; no immediate hazard is implied.

• Review error history: Some Culligan controls allow viewing stored error codes. Check for recurring faults (motor, flow, brine) and address those first.
• Check basic operation: Confirm the unit is regenerating on schedule, using salt, and delivering soft water.
• Reset service reminder: If your manual indicates a way to reset the service timer, follow those steps. If the message returns quickly, a deeper issue may exist.

If you cannot clear the message or if other error codes accompany it, schedule a professional Culligan service visit.