If you're turning on your heat and cold air is coming out, then this is what you can try. You have to get behind the glove box. Open the glove box, and just find all the screws that are holding the actual "box" part on door. Once this is out, you should be able to see a some wires and body paneling. Feel behind the lower left side of the glove box and try and find a lever which will move up and down. This lever switches your vents from the heating core to the A/C. Start up your car and put the heat on full blast. Then, while feeling the lever, push the "max A/C" button. If this lever doesn't try to move, there is your problem. Try using a rubber band to hold the lever in the heating position. You won't be able to use the A/C once the lever is bound, but when summer comes, just take off the rubber band.
To replace the heater core on a 1989 Lincoln Mark VII, first, disconnect the battery and drain the coolant from the radiator. Remove the dashboard and the center console to access the heater box. Disconnect the heater hoses from the core, unbolt the heater box, and carefully remove the old heater core. Install the new heater core, reassemble the heater box, reconnect the hoses, and put the dashboard back in place before refilling the coolant and reconnecting the battery.
I need to know how to place it,and where is it located at on the car
You have to connect the both hoses that go into the heater core on the passenger side but that will throw codes and you will have a light on the dash
To replace the heater core on a 1972 Lincoln Mark IV, first disconnect the battery and drain the coolant from the radiator. Remove the dashboard and the center console to access the heater box, then detach the heater hoses from the core. After unscrewing the heater box, you can extract the old heater core and replace it with a new one, reassembling everything in reverse order. Finally, refill the cooling system with coolant and check for leaks.
To change the heater core in a 1972 Lincoln Mark IV, start by disconnecting the battery and draining the cooling system. Remove the dashboard components to access the heater box, then disconnect the heater hoses from the core. Unbolt the heater core from the housing, replace it with the new unit, and reassemble everything in reverse order, ensuring all connections are secure before refilling the cooling system and reconnecting the battery.
To replace the heater core on a 1970 Continental Mark III, first, disconnect the battery and drain the cooling system. Remove the dashboard by taking out the necessary screws and components to access the heater box. Disconnect the heater core hoses from the engine bay, then unbolt and remove the heater core from the heater box. Finally, install the new heater core, reassemble the dashboard, and refill the cooling system before reconnecting the battery.
You have to drop the steering column and pull the dash. Then after locating the heater core case below windshield you have to cut out a piece with a Dremel. After replacing the heater core you have fun putting everything back together..(use plastic weld to seal the case back up).in other words don't do it yourself it is a huge pain.
Passenger side under the dash
A/C or Heater? Be more specific.
This link has detailed instructions and photos http:/www.lincolnvscadillac.com/tech/lincoln-mark-viii/Thermostat-Replacement/index.htm
e bay
Under the dash passenger side