How do you replace a heater core in an 2002 ford escort zx2?

To replace the heater core in a 2002 Ford Escort ZX2, first, disconnect the battery and drain the coolant. Remove the dashboard and center console to access the heater core housing. Disconnect the heater core hoses, remove the screws securing the core, and carefully take it out. Install the new heater core by reversing these steps, ensuring all connections are secure before reassembling the dashboard and refilling the coolant.