Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rcb93c23a573d69d251ba0a42098600bdb37a3b4f -r8091f0c55008b0704793a533e38728fae1c7df9b
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision cb93c23a573d69d251ba0a42098600bdb37a3b4f)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 8091f0c55008b0704793a533e38728fae1c7df9b)
@@ -1022,9 +1022,6 @@
 {
     HD_PRE_TREATMENT_PAT_CONN_STATE_T nextState = PRE_TREATMENT_PAT_CONN_WAIT_FOR_UF_VOL_STATE;
 
-    // Look for cartridge door to open (indicating user inverting dialyzer)
-    handlePatientConnectionDoorOpened();
-
     // If UF volume set by user, move on to next state
     if ( TRUE == setUFVolStatus )
     {
@@ -1053,9 +1050,6 @@
 
     if ( ( TRUE == doorOpened ) && ( STATE_CLOSED == getSwitchStatus( FRONT_DOOR ) ) )
     {
-        setDialInPumpTargetFlowRate( DIP_PATIENT_CONNECTION_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
-        cmdStartDGTrimmerHeater();
-        doorClosedRequired( TRUE, TRUE );
         nextState = PRE_TREATMENT_PAT_CONN_WAIT_FOR_USER_CONFIRM_STATE;
     }
 
@@ -1075,7 +1069,10 @@
 {
     HD_PRE_TREATMENT_PAT_CONN_STATE_T nextState = PRE_TREATMENT_PAT_CONN_WAIT_FOR_USER_CONFIRM_STATE;
 
-    if ( TRUE == patientConnectionConfirm )
+    // Look for cartridge door to open and then close (indicating user inverted dialyzer)
+    handlePatientConnectionDoorOpened();
+
+    if ( ( TRUE == patientConnectionConfirm ) && ( STATE_CLOSED == getSwitchStatus( FRONT_DOOR ) ) )
     {
         doorClosedRequired( TRUE, TRUE );
         nextState = PRE_TREATMENT_PAT_CONN_WAIT_FOR_TREATMENT_START_STATE;