it's old and you need to change it.
If a 1988 Lincoln Town Car is blowing both hot and cold air when the air conditioning is on, there could be a problem with the thermostat. There might also be a problem with the level of refrigerant in the air conditioning pump.
If your ac is making noises or is blowing hot air instead of cold
sounds like your freon may be low
Sounds like your cooling system termostate is stuck open.
Obviously you have a cold if you are constantly blowing or you have something spicy or you are crying
if its blowing, but not blowing cold its low on coolant. it takes r134a.
Either you are out of freon, your compressor is broken or your cabin filter is plugged. There are other possibilities but these are the most obvious.
Blowing Hot and Cold - 1989 is rated/received certificates of: Australia:M
It could be the heater valve which is located under the hood to the passenger side down below the radiator and fan units.
Ask this question again. Is the question no blowing or blowing cold?
maybe the a/c needs to be recharged with freon