Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -r96dd3e3d17fdfd5b70870bfc15d12a147f4900ee -r2cc816226fc1be6c82aecbb3eee0408dafe559b5
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 96dd3e3d17fdfd5b70870bfc15d12a147f4900ee)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 2cc816226fc1be6c82aecbb3eee0408dafe559b5)
@@ -139,7 +139,9 @@
 
 static U32 pumpSpeedIndex;                                                                                   ///< Index used to access the desired pump speed in roPumpFlushBubblesSpeed table.
 static BOOL havePauseActuatorsBeenSet;                                                                       ///< Flag to indicate the actuators have been set to pause for the first time.
-static BOOL hasROOnlyModeBeenEnabled;                                                                        ///< Flag to indicate the RO only mode has been set or not.
+// NOTE: This variable should be initialized here because the init function is called every time and then this variable is set to FALSE even if the settings from the
+// UI wants the RO only mode.
+static BOOL hasROOnlyModeBeenEnabled = FALSE;                                                                ///< Flag to indicate the RO only mode has been set or not.
 static OVERRIDE_F32_T usedAcidVolumeML = { 0.0, 0.0, 0.0, 0.0 };                                             ///< The integrated acid concentration volume has been used in mL.
 static OVERRIDE_F32_T usedBicarbVolumeML = { 0.0, 0.0, 0.0, 0.0 };                                           ///< The integrated bicarb concentration volume has been used in mL.
 static OVERRIDE_U32_T fillModeDataPublishInterval = { FILL_MODE_DATA_PUB_INTERVAL,
@@ -195,7 +197,6 @@
     sumFillCPoConductivity        = 0.0F;
     sumFillRejRatio               = 0.0F;
     fillCPoConductivitySampleCnt  = 0;
-    hasROOnlyModeBeenEnabled      = FALSE;
 }
 
 /*********************************************************************//**