How do you replace heater core in 1996 Ford aspire?

To replace the heater core in a 1996 Ford Aspire, first, drain the coolant from the radiator and remove the dashboard to access the heater core. Disconnect the hoses connected to the heater core, remove any mounting screws, and take out the old core. Install the new heater core by reversing the removal process, ensuring all connections are secure, and then reassemble the dashboard before refilling the coolant. Finally, check for leaks and ensure the heating system functions properly.