Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -rd5fb5e81313178d4b8a1d1f2dbcb6440815ef3de -rdf0df237b2a946a1599a45d9e3585194fd550829
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision d5fb5e81313178d4b8a1d1f2dbcb6440815ef3de)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision df0df237b2a946a1599a45d9e3585194fd550829)
@@ -41,7 +41,7 @@
 #define CONCENTRATE_PUMP_SPEED_INCREMENT                    2.0F                                                ///< Speed increase (mL/min) when controlling concentrate pump to target step speed.
 #define CONCENTRATE_PUMP_MIN_SPEED                          3.0F                                                ///< Minimum speed for concentrate pump in mL per min.
 #define CONCENTRATE_PUMP_TX_SPD_OUT_OF_RANGE_TOL_PCT        0.02F                                               ///< Concentrate pump treatment speed out of range tolerance when on in percentage.
-#define CONCENTRATE_PUMP_HEAT_DIS_SPD_OUT_OF_RANGE_TOL_PCT  0.05F                                               ///< Concentrate pump heat disinfect speed out of range tolerance when on in percentage.
+#define CONCENTRATE_PUMP_CLEANING_SPD_OUT_OF_RANGE_TOL_PCT  0.05F                                               ///< Concentrate pump cleaning mode speed out of range tolerance when on in percentage.
 #define CONCENTRATE_PUMP_SPD_OUT_OF_RANGE_TOL_WHEN_SLOW_MLPM 1.0F                                               ///< Concentrate pump speed out of range tolerance when slow in mL/min.
 #define CONCENTRATE_PUMP_LOW_SPEED_THRESHOLD_MLPM           10.0F                                               ///< Concentrate pump low speed threshold in mL/min.
 #define CONCENTRATE_PUMP_ZERO_FLOW_RATE                     0xFFFF                                              ///< Pulse width value when zero flow rate or pump is off.
@@ -1001,9 +1001,14 @@
     {
         // Check if the pump is not in the off state and if it is not and greater than the minimum threshold, divide the error
         // to target speed. If the pump is off the target speed is 0 so the speed check is done differently
-        // The speed tolerance is looser in heat disinfect that the rest of the modes that the concentrate pump are running.
+        // The speed tolerance is looser in heat disinfect and flush than the rest of the modes that the concentrate pump are running.
         cpError   = cpError / cpTargetSpeed;
-        tolerance = ( DG_MODE_HEAT == opMode ? CONCENTRATE_PUMP_HEAT_DIS_SPD_OUT_OF_RANGE_TOL_PCT : CONCENTRATE_PUMP_TX_SPD_OUT_OF_RANGE_TOL_PCT );
+        tolerance = CONCENTRATE_PUMP_TX_SPD_OUT_OF_RANGE_TOL_PCT;
+
+        if ( ( DG_MODE_HEAT == opMode ) || ( DG_MODE_FLUS == opMode ) )
+        {
+            tolerance = CONCENTRATE_PUMP_CLEANING_SPD_OUT_OF_RANGE_TOL_PCT;
+        }
     }
 
     isCpSpeedOut = ( cpError > tolerance ? TRUE : FALSE );