Index: firmware/App/Services/Reservoirs.c
===================================================================
diff -u -r9d81efee3ea73c452bb6b84501c8accf85ab81f7 -ref398e685d6cfbdcb8c18fd9319819672c6c9d89
--- firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision 9d81efee3ea73c452bb6b84501c8accf85ab81f7)
+++ firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision ef398e685d6cfbdcb8c18fd9319819672c6c9d89)
@@ -606,16 +606,20 @@
     if ( ( TRUE == didTimeout( reservoirSwitchStartTimeMS, 15000 /*RESERVOIR_SETTLE_TIME_MS*/ ) ) &&
          ( ( dilutionLevelPct >= MAX_RESERVOIR_DILUTION ) || ( volSpentML >= (F32)FILL_RESERVOIR_TO_VOLUME_ML ) || ( getReservoirWeight( active ) > MAX_RESERVOIR_VOL_BEFORE_SWITCH_ML ) ) )
     {
-        DG_RESERVOIR_ID_T inactiveRes = getDGInactiveReservoir();
+        DG_SWITCH_RSRVRS_CMD_T rsrvrCmd;
 
+        DG_RESERVOIR_ID_T inactiveRes   = getDGInactiveReservoir();
+        rsrvrCmd.reservoirID            = (U32)inactiveRes;
+        rsrvrCmd.useLastTrimmerHeaterDC = TRUE;
+
         // TODO test code remove
         //if ( TRUE == test ) // TODO comment the if statement
         {
             // Signal dialysis sub-mode to capture baseline volume for next reservoir.
             setStartReservoirVolume( inactiveRes );
 
             // Command DG to switch reservoirs
-            cmdSetDGActiveReservoir( inactiveRes );
+            cmdSetDGActiveReservoir( &rsrvrCmd );
 
             // Signal dialysis sub-mode to switch reservoirs
             signalReservoirsSwitched();