Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r22176ce95e49213c48454f34ddf5d29b8109f2cb -rec55d622a5c4acbe1aa077eba38a9e34c559a85f
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 22176ce95e49213c48454f34ddf5d29b8109f2cb)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision ec55d622a5c4acbe1aa077eba38a9e34c559a85f)
@@ -71,6 +71,7 @@
 #define MAXIMUM_ALLOWED_TARGET_TEMPERATURE_DEVIATION_C             0.25F                                                           ///< Maximum allowed temperature deviation from target temperature in C.
 #define PRIMARY_HEATER_DUTY_CYCLE_PER_TEMPERATURE_C                0.03F                                                           ///< Primary heaters duty cycle per temperature in C.
 #define DATA_PUBLISH_COUNTER_START_COUNT                           70                                                              ///< Data publish counter start count.
+#define MIN_RO_HEATER_FLOWRATE_LPM                                 0.2F                                                            ///< Minimum target RO heater flow rate in L/min.
 
 static const F32 WATER_SPECIFIC_HEAT_DIVIDED_BY_MINUTES = 4184 / SEC_PER_MIN;                                                      ///< Water specific heat in J/KgC / 60.
 static const F32 PRIMARY_HEATERS_MAXIMUM_POWER_WATTS    = 475 + 237.5F;                                                            ///< Primary heaters maximum power (main primary = 475W and small primary = 237.5W).
@@ -376,7 +377,7 @@
             // TODO add the function that gets the flow of the new flow sensor for DG. For now it is assumed that trimmer heater flow sensor
             // is not 0 so the heater can run if needed
             F32 measFlow   = ( DG_PRIMARY_HEATER == heater ? getMeasuredROFlowRateLPM() : 50.0 );
-            F32 minFlow    = ( DG_PRIMARY_HEATER == heater ? MIN_RO_FLOWRATE_LPM : MIN_RO_FLOWRATE_LPM );
+            F32 minFlow    = ( DG_PRIMARY_HEATER == heater ? MIN_RO_HEATER_FLOWRATE_LPM : MIN_RO_HEATER_FLOWRATE_LPM );
             BOOL isFlowLow = ( measFlow < minFlow ? TRUE : FALSE );
 
             checkPersistentAlarm( ALARM_ID_DG_FLOW_TOO_LOW_WHILE_HEATER_ON, isFlowLow, measFlow, minFlow );