How do you change the evaporator core on a 2005 crown Victoria?

To change the evaporator core on a 2005 Crown Victoria, first disconnect the battery and remove the dashboard to access the HVAC unit. Drain the coolant and remove the heater hoses connected to the evaporator. Next, unbolt the HVAC unit from the vehicle and open it to replace the evaporator core. Reassemble the HVAC unit, reconnect the hoses, reattach the dashboard, and refill the coolant before testing the system.