Index: firmware/App/Modes/Dialysis.c
===================================================================
diff -u -rb0b3522f2bd0b5b20ecbfd53c8f55b0e646ffa11 -r101bf85b0b425e919b01b4b7fabcbd15fd5bbde5
--- firmware/App/Modes/Dialysis.c	(.../Dialysis.c)	(revision b0b3522f2bd0b5b20ecbfd53c8f55b0e646ffa11)
+++ firmware/App/Modes/Dialysis.c	(.../Dialysis.c)	(revision 101bf85b0b425e919b01b4b7fabcbd15fd5bbde5)
@@ -152,8 +152,13 @@
 
     if ( TREATMENT_DIALYSIS_STATE == getTreatmentState() )
     {
+#ifndef RUN_PUMPS_OPEN_LOOP
         setBloodPumpTargetFlowRate( setBloodFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_CLOSED_LOOP );
         setDialInPumpTargetFlowRate( setDialysateFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_CLOSED_LOOP );
+#else
+        setBloodPumpTargetFlowRate( setBloodFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+        setDialInPumpTargetFlowRate( setDialysateFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+#endif
         setDialOutPumpTargetRate( setDialysateFlowRate + (S32)setUFRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_CLOSED_LOOP );
     }
 }
@@ -175,8 +180,13 @@
     // send dialysate outlet pump latest UF volumes
     setDialOutUFVolumes( refUFVolume, measUFVolume );
     // restart pumps
+#ifndef RUN_PUMPS_OPEN_LOOP
     setBloodPumpTargetFlowRate( setBloodFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_CLOSED_LOOP );
     setDialInPumpTargetFlowRate( setDialysateFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_CLOSED_LOOP );
+#else
+    setBloodPumpTargetFlowRate( setBloodFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+    setDialInPumpTargetFlowRate( setDialysateFlowRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+#endif
     setDialOutPumpTargetRate( setDialysateFlowRate + (S32)setUFRate, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_CLOSED_LOOP );
     // TODO - Heparin pump
     // tell DG to start heating dialysate