Index: firmware/App/Modes/TreatmentEnd.c
===================================================================
diff -u -r44a100f8e5210a02c23b8fcc4527d8e96d577381 -r844f98879b7425c207b58562e623ab960adbc357
--- firmware/App/Modes/TreatmentEnd.c	(.../TreatmentEnd.c)	(revision 44a100f8e5210a02c23b8fcc4527d8e96d577381)
+++ firmware/App/Modes/TreatmentEnd.c	(.../TreatmentEnd.c)	(revision 844f98879b7425c207b58562e623ab960adbc357)
@@ -39,8 +39,10 @@
 /// Max time to wait for user to initiate final rinseback.
 static const U32 TX_END_TIMEOUT_MS      = ( ( 15 * 60 * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL );  // TODO - get time from Systems
 
-/// Maximum time in this mode before blood sitting warning given (in general task intervals).
+/// Maximum time in this mode before blood sitting alarm given (in general task intervals).
 static const U32 MAX_TIME_BLOOD_SITTING = ( ( 5 * SEC_PER_MIN * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL );
+/// Maximum time in this mode before blood sitting warning given (in general task intervals).
+static const U32 WARN_TIME_BLOOD_SITTING = ( ( 4 * SEC_PER_MIN * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL );
 
 // ********** private data **********
 
@@ -275,8 +277,13 @@
     else
     {
         // Ensure we do not sit in stopped state for too long
+        if ( bloodSittingTimerCtr > WARN_TIME_BLOOD_SITTING )
+        {
+            activateAlarmNoData( ALARM_ID_BLOOD_SITTING_WARNING );
+        }
         if ( bloodSittingTimerCtr > MAX_TIME_BLOOD_SITTING )
         {
+            // Raise the alarm
             activateAlarmNoData( ALARM_ID_TREATMENT_STOPPED_NO_RINSEBACK );
         }
     }