Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -r633861a3e472c1a288fa10a52ec0f7e7153e4dce -r981de1f5228152ec6877aceae3d66ebf5efc7101
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 633861a3e472c1a288fa10a52ec0f7e7153e4dce)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 981de1f5228152ec6877aceae3d66ebf5efc7101)
@@ -60,6 +60,7 @@
 static U32 dgSubMode = 0;                                       ///< Current state (sub-mode) of current DG operation mode.
 static BOOL dgStarted = FALSE;                                  ///< Flag indicates whether we have commanded the DG to start or stop.
 static BOOL dgTrimmerHeaterOn = FALSE;                          ///< Flag indicates whether we have commanded the DG to start or stop the trimmer heater.
+static BOOL dgWaterSampled = FALSE;                             ///< Flag indicates whether we have commanded the DG to sample water.
 
 // State machine states
 /// Current state of treatment mode reservoir management.
@@ -126,6 +127,7 @@
 
     dgStarted = FALSE;
     dgTrimmerHeaterOn = FALSE;
+    dgWaterSampled = FALSE;
     dgPrimaryTempSet = 0.0;
     dgTrimmerTempSet = 0.0;
     dgActiveReservoirSet = DG_RESERVOIR_2;
@@ -854,9 +856,10 @@
  * @details Outputs: sample water command sent to DG.
  * @return none
  *************************************************************************/
-void cmdDGSampleWater( SAMPLE_WATER_CMD_T cmd )
+void cmdDGSampleWater( void )
 {
-    sendDGSampleWaterCommand( cmd );
+    dgWaterSampled = TRUE;
+    sendDGSampleWaterCommand();
 }
 
 /*********************************************************************//**