Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r7665bfea357e3800ae5ac5f42658e31cde1d6a76 -ra183c6d91569ee07c9e944c989b67dc818a87941
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 7665bfea357e3800ae5ac5f42658e31cde1d6a76)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision a183c6d91569ee07c9e944c989b67dc818a87941)
@@ -180,7 +180,7 @@
     else if ( TRUE == pendingStartDDFlushRequest )
     {
         pendingStartDDFlushRequest = FALSE;
-        requestNewOperationMode( DD_MODE_FLUS );
+//        requestNewOperationMode( DD_MODE_FLUS );
     }
     else if ( TRUE == pendingStartDDHeatDisinfectRequest )
     {
Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -rff0edadf0c6f161a0a092ddaf94d1940d64f7d5e -ra183c6d91569ee07c9e944c989b67dc818a87941
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision ff0edadf0c6f161a0a092ddaf94d1940d64f7d5e)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision a183c6d91569ee07c9e944c989b67dc818a87941)
@@ -204,6 +204,9 @@
     { MSG_ID_DD_PRE_GEND_MODE_DATA_PUBLISH_OVERRIDE_REQUEST,                        &testDDPreGenDialysateDataPublishIntervalOverride },
     { MSG_ID_DD_POST_GEND_MODE_DATA_PUBLISH_OVERRIDE_REQUEST,                       &testDDPostGenDialysateDataPublishIntervalOverride },
     { MSG_ID_DD_PRE_GEN_DIALYSATE_REQUEST_DATA,                                     &handlePreGenDialysateRequestMsg },
+    { MSG_ID_TD_DD_FLUSH_REQUEST,                                                   &handleTDRequestDDFlush },
+    { MSG_ID_TD_DD_HEAT_DISINFECT_REQUEST,                                          &handleTDRequestDDHeatDisinfect },
+    { MSG_ID_TD_DD_HEAT_DISINFECT_ACTIVE_COOL_REQUEST,                              &handleTDRequestDDHeatDisinfectActiveCool },
     { MSG_ID_FW_VERSIONS_REQUEST,                                                   &handleVersionRequestMessage },
     { MSG_ID_DD_SAFETY_SHUTDOWN_OVERRIDE_REQUEST,                                   &testSetResetSafetyShutdownOverride },
     { MSG_ID_DD_UF_DATA_PUBLISH_OVERRIDE_REQUEST,                                   &testDDUFDataPublishIntervalOverride },
Index: firmware/App/Services/TDInterface.c
===================================================================
diff -u -rbd522c8ffdf75130571e5b6a79d1b1d6acd78b1c -ra183c6d91569ee07c9e944c989b67dc818a87941
--- firmware/App/Services/TDInterface.c	(.../TDInterface.c)	(revision bd522c8ffdf75130571e5b6a79d1b1d6acd78b1c)
+++ firmware/App/Services/TDInterface.c	(.../TDInterface.c)	(revision a183c6d91569ee07c9e944c989b67dc818a87941)
@@ -609,7 +609,96 @@
     return result;
 }
 
+/*********************************************************************//**
+ * @brief
+ * The handleTDRequestDDFlush function handles a DD flush request from TD.
+ * @details \b Inputs: none
+ * @details \b Outputs: DD flush request processed
+ * @param message Pointer to the received message
+ * @return TRUE if request is accepted, FALSE otherwise.
+ *************************************************************************/
+BOOL handleTDRequestDDFlush( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
 
+    if ( message->hdr.payloadLen == sizeof(U32) )
+    {
+        BOOL startingDDFlush;
+
+        memcpy( &startingDDFlush, message->payload, sizeof(U32) );
+
+        if ( TRUE == startingDDFlush )
+        {
+            result = startDDFlush();
+        }
+        else
+        {
+            ;// DO nothing
+        }
+    }
+
+    // Respond to request
+    sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_DD_2_TD, result );
+
+    return result;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleTDRequestDDHeatDisinfect function handles a DD heat disinfection
+ * request from TD.
+ * @details \b Inputs: none
+ * @details \b Outputs: DD heat disinfection request processed
+ * @param message Pointer to the received message
+ * @return TRUE if request is accepted, FALSE otherwise.
+ *************************************************************************/
+BOOL handleTDRequestDDHeatDisinfect( MESSAGE_T *message )
+{
+    BOOL status = FALSE;
+
+    if ( message->hdr.payloadLen == sizeof(U32) )
+    {
+        status = startDDHeatDisinfect( );
+    }
+
+    sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_DD_2_TD, status );
+
+    return status;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The handleTDRequestDDHeatDisinfectActiveCool function handles a DD heat
+ * disinfection active cool request from TD.
+ * @details \b Inputs: none
+ * @details \b Outputs: DD heat disinfection active cool request processed
+ * @param message Pointer to the received message
+ * @return TRUE if request is accepted, FALSE otherwise.
+ *************************************************************************/
+BOOL handleTDRequestDDHeatDisinfectActiveCool( MESSAGE_T *message )
+{
+    BOOL status = FALSE;
+
+    if ( message->hdr.payloadLen == sizeof(U32) )
+    {
+        BOOL startingDDHeatDisinfect;
+
+        memcpy( &startingDDHeatDisinfect, message->payload, sizeof(U32) );
+
+        if ( TRUE == startingDDHeatDisinfect )
+        {
+            status = startDDHeatDisinfectActiveCool( );
+        }
+        else
+        {
+            ;//do nothing
+        }
+    }
+
+    sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_DD_2_TD, status );
+
+    return status;
+}
 /*************************************************************************
  *                       TEST SUPPORT FUNCTIONS
  *************************************************************************/
Index: firmware/App/Services/TDInterface.h
===================================================================
diff -u -rc992ffdef2060d3d534abd2538bfb31dd25b9fbc -ra183c6d91569ee07c9e944c989b67dc818a87941
--- firmware/App/Services/TDInterface.h	(.../TDInterface.h)	(revision c992ffdef2060d3d534abd2538bfb31dd25b9fbc)
+++ firmware/App/Services/TDInterface.h	(.../TDInterface.h)	(revision a183c6d91569ee07c9e944c989b67dc818a87941)
@@ -40,6 +40,9 @@
 
 BOOL handleDialysateDeliveryRequestMsg( MESSAGE_T *message );
 BOOL handlePreGenDialysateRequestMsg( MESSAGE_T *message );
+BOOL handleTDRequestDDFlush( MESSAGE_T *message );
+BOOL handleTDRequestDDHeatDisinfect( MESSAGE_T *message );
+BOOL handleTDRequestDDHeatDisinfectActiveCool( MESSAGE_T *message );
 
 void setTDOpMode( U32 opMode, U32 subMode );
 void setTDDialysateFlowrate( F32 dialFlowrate );