1998 Lincoln Mark VIII Repair Question
Is the engine temp normal? or is that also running cooler than normal, your thermostat may be jambed open causing the cool running, feel both heater hoses with the engine hot, are they both hot, and about the same temp?
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Most likely you have a broken blend air door. The 2nd Gen Mk8's are well known for this problem. Ford came out with one a little beefier than the old design.
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