Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -ra89d6b091874136d75a9bfbdbbc1ff00f42467b3 -r1e49739be76330ea194f0eb2d30e4643932506a9
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision a89d6b091874136d75a9bfbdbbc1ff00f42467b3)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 1e49739be76330ea194f0eb2d30e4643932506a9)
@@ -629,7 +629,7 @@
 static F32 calculatePrimaryHeaterDutyCycle( F32 targetTemperature, F32 currentTemperature, F32 flow, BOOL checkEfficiency )
 {
     // Get the primary heater's efficiency and the last fill temperature from the ModeFill
-    F32 heaterEfficiency = heatersStatus[ DG_PRIMARY_HEATER ].heaterEfficiency;
+    F32 heaterEfficiency = heatersStatus[ DG_PRIMARY_HEATER ].heaterEstGain;
 
 #ifndef _RELEASE_
     if ( getSoftwareConfigStatus( SW_CONFIG_DISABLE_HEATERS_EFFICIENCY ) != SW_CONFIG_ENABLE_VALUE )
@@ -657,7 +657,7 @@
             heaterEfficiency = MAX( heaterEfficiency, 0.0 );
 
             // Update the heaters efficiency
-            heatersStatus[ DG_PRIMARY_HEATER ].heaterEfficiency = heaterEfficiency;
+            heatersStatus[ DG_PRIMARY_HEATER ].heaterEstGain = heaterEfficiency;
         }
     }