No Air I get no air inside, Checked heater hose and they get hot, however I do get hot air while driving which is outside air, my panel shows temperature when I turn knob but I get no air inside vehicle at all when I turn fan to high or low this is a 3.5 liter engine with keyless entry.

The Lincoln has a cabin air filter which filters outside air. It is probably plugged therefore the heater can only recirculate the the air inside the car. The results are windshield may clear but most other windows away from the heat stay fogged up.
Try changing the cabin air filter and see if it helps a great deal.

is there a chance that one of your heater hoses are clogged? or where they connect to the engine are clogged still? sounds like a clogged system. Cracked heater housing? Outside air bypassing the heater coil while driving?

The dash gauges are notoriously inaccurate. But it is possible that the thermostat is stuck open. Does the upper radiator hose get hot after engine warmed up? Also feel both heater hoses-when engine is warm, both should be hot-indicating the coolant is circulating through the heater core. If heater hoses are hot, and you still have cold air, the temperature blend door on the heater case may not be operating.
Try a new thermostat and see if engine warms up faster and better.

Sounds like the problem lies in the thermostat, When the engine thermostat fails to close fully, the engine coolant temperature may fall. Low engine temperature causes several problems and may cause the heater to blow cool air. Make sure about that.

has some one messed with the recirculation control so that by moving the lever/knob will shut the vent off
if they have , there is a problem that you will have to fix first

Interesting symptoms.If the expansion reservoir was filled with icy slush, then your coolant/water ratio is way off. My first theory is that your cooling system needs a thorough flushing.

Heater cores can get blocked with rust (from the engine, when there's too little green coolant in the mix), as can the radiator.

The solution requires the cooling system to be drained. The heater hoses should be disconnected and back-flushed with a hose. Replace the radiator and heater hoses if they are soft and squishy or very rigid. Replace any hose clamps that need it.

Remove the thermostat and check it's not stuck open as this will cause the no-heat problem. Replace it if there's any doubt.

Put everything back together, fill with soft or distilled water, bring to operating temperature. Let it cool down, drain it to remove any remaining rust sludge, and refill again with the proper green coolant mix, which should be 50/50 to 60/40 depending on your area.

In the past, I have had trouble with my heater blowing cold air after blowing hot for a while.. checked and added antifreeze and it worked properly again.

have you checked for hot water in the pipes ??

Hi There, If the fan blows only cold air, then you might have a restriction on the heater core. The heater core is like a small radiator inside your dash. The coolant flow through it can be restricted by corrosion. The lack of flow of coolant through the heater core will result in a lack of warm air inside the car. Flushing out the heater core may help. If not, you will have to replace it. I would say though, 80% of the time the cause is just restriction. Get the heater core flushed and I am sure you will get your heat back. MIke

Have you checked the heater tap to see that it is working?If the heater tap is working you can undo the hoses at the firewall and use a garden hose to check that the water is flowing freely through both the heater radiator core and the engine.poke the garden hose up one of the hoses you removed and turn the water on make sure water is flowing freely out the other hose,if clear repeat test on heater radiator core.If heater core is blocked and you have compressed air you can gently flush the core by blowing the water through it.