Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r7278aeac8fdd894067a05c3bd3a177d38c0b0803 -rdaa4204266112042cdd5ea671df81b7501f1623f
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 7278aeac8fdd894067a05c3bd3a177d38c0b0803)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision daa4204266112042cdd5ea671df81b7501f1623f)
@@ -78,6 +78,7 @@
 #define HEATERS_MAX_VOLTAGE_OUT_OF_RANGE_TOL                       0.2F                                                            ///< Heaters max voltage out of range tolerance.
 #define D5_HEATER_DEADBAND_CONTROL                                 0.1F                                                            ///< Heater dead band range for control.
 
+//#define D5_HEAT_CONTROL_INTERVAL_MS                                30000                                                           /// Primary heater control interval in milli seconds
 #define D5_HEAT_CONTROL_INTERVAL_MS                                3000                                                            /// Primary heater control interval in milli seconds
 #define D5_HEAT_CONTROL_INTERVAL_COUNT                             ( D5_HEAT_CONTROL_INTERVAL_MS / TASK_GENERAL_INTERVAL )         ///< Primary heater control interval count.
 #define D45_HEAT_CONTROL_INTERVAL_MS                               ( 1 * MS_PER_SECOND )                                           ///< Trimmer heater control interval in milli seconds
@@ -606,9 +607,7 @@
     if ( ++primaryTargetTempAdjCounter >= d5OuterLoopControlInterval )
     {
 #ifdef __USE_D1_TEMP_
-
         // Use new RTD sensor placed closed to dialyzer, connected to D1 port
-
         measuredTempAtDialyzer = getFilteredTemperatureValue( D1_TEMP );
 #else
         if ( TRUE == getTestConfigStatus( TEST_CONFIG_DD_FP_ENABLE_BETA_1_9_HW ) )
@@ -899,7 +898,10 @@
             }
             else
             {
-                checkPersistentAlarm( ALARM_ID_DD_FLUID_TOO_LOW_WHILE_D45_HEAT_IS_ON, FALSE, 0.0F, 0.0F );
+                if ( getTestConfigStatus( TEST_CONFIG_DD_DISABLE_CONDUCTIVE_LEVEL_SENSOR_ERROR ) != TRUE )
+                {
+                    checkPersistentAlarm( ALARM_ID_DD_FLUID_TOO_LOW_WHILE_D45_HEAT_IS_ON, FALSE, 0.0F, 0.0F );
+                }
             }
         }
     }