Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -rb0da135bc589efaf8ad6f3c8c1988dcb672f3ca0 -r7d7129ebe8a98694bea7cf4118f3bedf62f2157b
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision b0da135bc589efaf8ad6f3c8c1988dcb672f3ca0)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 7d7129ebe8a98694bea7cf4118f3bedf62f2157b)
@@ -79,6 +79,7 @@
 #define D5_HEATER_PWM_ADJ_SLOPE_FACTOR                             0.00005F                                                        ///< AC heater close loop PWM adjustment slope factor
 #define D5_HEATER_PWM_INTERCEPT_FACTOR                             0.0055F                                                         ///< AC heater close loop PWM adjustment intercept factor
 
+//#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                               ( 3 * MS_PER_SECOND )                                           ///< Trimmer heater control interval in milli seconds
@@ -527,7 +528,7 @@
         }
         else
         {
-            measuredTempAtDialyzer      = getConductivityTemperature( D27_COND );
+            measuredTempAtDialyzer      = getFilteredConductivitySensorTemperature( D27_COND );
         }
 
         F32 calcTargetTemp              = getHeaterTargetTemperature( D5_HEAT );