Index: firmware/App/Controllers/DGInterface.c
===================================================================
diff -u -r1978e8476dc44688ed69531c236c154829ab8a76 -r1c04924590760ca29e1c9fe19bca65ec5ce428fe
--- firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 1978e8476dc44688ed69531c236c154829ab8a76)
+++ firmware/App/Controllers/DGInterface.c	(.../DGInterface.c)	(revision 1c04924590760ca29e1c9fe19bca65ec5ce428fe)
@@ -8,12 +8,14 @@
 * @file    DGInterface.c
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      13-Jul-2022
+* @date    (last)      15-Jul-2022
 *
 * @author  (original)  Sean
 * @date    (original)  08-Apr-2020
 *
 ***************************************************************************/
+
+#include <math.h> // To check for NaN
 
 #include "DialInFlow.h"
 #include "Dialysis.h"
@@ -482,6 +484,12 @@
  *************************************************************************/
 void setDialysateFlowData( F32 flowRate )
 {
+    // Check if the sent value by DG is a NaN
+    if ( isnan( flowRate ) )
+    {
+        flowRate = 0.0;
+    }
+
     dgDialysateFlowRateMlMin = flowRate;
     dgDialysateFlowDataFreshFlag = TRUE;
 }