Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -rde9afc922d50eb0328cd107d7e03540a648b1f5b -rf1f385fa05236ec1c6eb9f746c3402f509233a7c
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision de9afc922d50eb0328cd107d7e03540a648b1f5b)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision f1f385fa05236ec1c6eb9f746c3402f509233a7c)
@@ -69,6 +69,7 @@
 #define TRIMMER_HEATER_MAX_POWER_W                                 66.5F                                                           ///< Trimmer heater maximum power in Watts.
 #define TRIMMER_HEATER_INITIAL_CONTROL_INTERVAL_COUNT              ( ( 10 * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL )              ///< Trimmer heater initial control interval count.
 #define TRIMMER_HEATER_CONTROL_INTERVAL_COUNT                      ( ( 30 * MS_PER_SECOND ) / TASK_GENERAL_INTERVAL )              ///< Trimmer heater control interval count.
+#define TRIMMER_HEATER_MIN_DIALYSATE_FLOWRATE_LPM                  0.05F                                                           ///< Trimmer heater minimum dialysate flow rate in L/min.
 
 #define DELTA_TEMPERATURE_TIME_COSNTANT_C                          8.6F                                                            ///< Delta temperature calculated from time constant.
 #define PRIMARY_HEATER_DUTY_CYCLE_PER_TEMPERATURE_C                0.015F                                                          ///< Primary heaters duty cycle per temperature in C.
@@ -371,7 +372,7 @@
             {
                 alarm     = ALARM_ID_DIALYSATE_FLOW_TOO_LOW_WHILE_TRIMMER_HEATER_IS_ON;
                 measFlow  = getMeasuredRawFlowRateLPM( DIALYSATE_FLOW_SENSOR );
-                minFlow   = MIN_DIALYSATE_FLOWRATE_LPM;
+                minFlow   = TRIMMER_HEATER_MIN_DIALYSATE_FLOWRATE_LPM;
                 isFlowLow = ( measFlow > minFlow ? FALSE : TRUE );
             }