Index: firmware/App/Tasks/TaskPriority.c
===================================================================
diff -u -r9eae2f683887bededd2240f51ddfc667d8c1d566 -r39fbf9fd993d5e735092cf4ad802d58d0f92f7b1
--- firmware/App/Tasks/TaskPriority.c	(.../TaskPriority.c)	(revision 9eae2f683887bededd2240f51ddfc667d8c1d566)
+++ firmware/App/Tasks/TaskPriority.c	(.../TaskPriority.c)	(revision 39fbf9fd993d5e735092cf4ad802d58d0f92f7b1)
@@ -107,8 +107,9 @@
     // Monitor rinse pump
     execRinsePumpMonitor();
 
+    //TODO: revert back once HDF issue resolved.
     // Monitor Substituion pump
-    execSubstitutionPumpMonitor();
+    //execSubstitutionPumpMonitor();
 
     // Second pass for FPGA
     execFPGA( FALSE );