Have a 2000 lincoln ls it over heat when sitting for long time or when you run air conditioner
The 2000 Lincoln overheat when sitting for long. This is usually caused when the coolant does not have enough water. Try replacing the water regularly and if this Is not effective, try changing the water pump, thermostats and radiator.
Could be a clogged radiator, bad thermostat or you're low on antifreeze. Antifreeze is also a coolant, therefore you should not just put water in your radiator is it is low.