Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r00b32a5dad2e136d31cfaf0de16f7767b9920fec -r5fc16235c1752c993b3f1285f3a2b9738372af7a
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 00b32a5dad2e136d31cfaf0de16f7767b9920fec)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 5fc16235c1752c993b3f1285f3a2b9738372af7a)
@@ -27,6 +27,7 @@
 #include "Heaters.h"
 #include "LoadCell.h"
 #include "MessagePayloads.h"
+#include "ModeHeatDisinfect.h"
 #include "ModeStandby.h"
 #include "ModeRecirculate.h"
 #include "MsgQueues.h"
@@ -2365,4 +2366,39 @@
     sendTestAckResponseMsg( (MSG_ID_T)message->hdr.msgID, result );
 }
 
+/*************************************************************************
+ * @brief
+ * The handleStartStopDGHeatDisinfect function handles a request start or
+ * stop DG heat disifect cycle.
+ * @details Inputs: none
+ * @details Outputs: message handled
+ * @param message: a pointer to the message to handle
+ * @return result
+ *************************************************************************/
+BOOL handleStartStopDGHeatDisinfect( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
+
+    if ( message->hdr.payloadLen == sizeof(U32) )
+    {
+        BOOL startingDGHeatDisinfect;
+
+        memcpy( &startingDGHeatDisinfect, message->payload, sizeof(U32) );
+
+        if ( TRUE == startingDGHeatDisinfect )
+        {
+            startDGHeatDisinfect();
+            result = TRUE;
+        }
+        else
+        {
+            stopDGHeatDisinfect();
+            result = TRUE;
+        }
+    }
+    sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_DG_2_HD, result );
+
+    return result;
+}
+
 /**@}*/