How do you replace evaporator in 1999 Lincoln town car?

To replace the evaporator in a 1999 Lincoln Town Car, first, disconnect the battery and drain the refrigerant from the A/C system. Remove the dashboard to access the HVAC housing, which involves taking out various components like the center console and air ducts. Once the housing is exposed, detach the evaporator core from the housing, replace it with the new unit, and reassemble everything in reverse order. Finally, recharge the A/C system with refrigerant and reconnect the battery.