Follow the heater hoses from the engine, they will lead you the heater core.
Sell your Ford junk its not the only problem you will have.
Under the dash on the passenger side
The heater core (a small radiator for your heat) is leaking, I would suggest a new heater core as they are about as cheep to replace as they are to repair.
Sound like your heater core blew out on you
Behind the dashboard, usually on the passenger side. Look in the engine compartment for the hoses that go from the engine through the firewall. Those are generally the heater hoses, which go to the heater core.
It is located on the pass/side next to blend door/heater core
Instualation of a heater core on a 1999 Ford Explorer V6, how do you install the heater core.
Is there a third fuse box for my 1993 ford econoline van for the rear heater
yes
inside of van in vicinity of heater core. to remove, remove battery from engine bay to access bolt that holds it in place
For the HEATER CORE ? No
How do you replace a heater core in a 1998 ford expedition?"