You might need a new thermostat or heater core.
Lincoln put a thermal switch in the hoses that run to the heater core in cars of this age. This switch would not allow the blower motor to run until the coolant was warm. This was a "luxury" feature to keep the heater from blowing cold air on your feet. After a few years these switchs would go bad. This could be your problem. I have replaced mine once and I'm looking into a way to bypass it. You can just use the vent function with heat to keep warm until you replace the switch, that's what I'm doing for now. I believe the switch runs about $50 from FoMoCo. You could also have the problems listed in the other answer.my Lincoln Town Car doesn't have the switch in the heater hose , now where do i look i have good AC but no hot air , where is the vac moter for the heater to outside air switch located ??1994 a breed by its self ?? ill just bet
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In order to replace the heater core, you have to go under the dash, passanger side. But before you go for it, you have to drain the coolant from the motor.
I own a 1994 acura integra and the heater/air conditioning blower is not working, I can not defrost my windows and the heat does not blow. What is wrong and how can the problem be fixed.
Might be a valve hanging up
My 1994 did the same thing.....the problem was in the high/low switch....
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Maybe thermostat is stuck open With my car, it was Heater matrix clogged with radiator sealant. The workshop cleaned it and it's start working fine!
It does not have a block heater.
Check the wire going to it on the passenger side, sometimes it gets corroded and you get the problem you describe.