1996 Lincoln Town Car. A/c will not blow out cool air. All things under the hood seems to be working correctly(sweaty/cold line, a/c compressor comes on, system has been recharged with no sign of leak, etc). What could be causing my a/c to continuously blow out hot air?

The compressor was running full time when the air bag was blown out. It probably fired the compressor. They are designed to run intermittently.

I do not have a code book ! Try this : Check black canister for cold feel (passenger side under hood)l. If cold, check all vacuum lines...vacuum motors move doors to divert fresh air thru hot or cold coils in plenum chamber (under dash).
A manual shouild help !

it blows out hot air and the lines is hot

The cooling fan on the radiator is being turned on by the radiator temp switch. This is normal. It keeps excessive heat and pressure from building up inside your engine. Excessive heat can cause radiators to overflow or hoses to burst. It is NOT a bad thing for that fan to be running for 2 - 3 mins.

Hi - There may be 2 separate problems. On my 1991 Lincoln Town Car, there is a Thermal Blower Lockout sensor that disables the heater from blowing until the engine temperature reaches a specific temperature. This way if you have vent or floor settings and 90 degrees set and it is winter, you won't get blasted with cold air. When the vehicle warms up, the TBL circuit enables the climate control to blow the hot air. If you use the flr/def instead of the floor or vent control, the TBL should not prevent the heater from working even with a cold engine. On my car, the TBL went bad and always prevented hot air from blowing on the floor and vent settings, even when the engine was hot. Another thing to check is a thermal limitor resistor. It is designed to cut off the blower at very hot temperatures, except if the blower fan is in the hi setting.

As far as the A/C is concerned, can you verify if the clutch is engaging or not? A rapid cycling of the clutch is an indication of low freon. If you are absolutely sure that you are fully charged on freon, I think there are 2 possible causes: (1) Bad pressure switch on the accumulator is indicating low freon that is telling the compressor not to work; (2) a blocked orifice tube.

To fix the AC unit which blows hot air all the time. Seems like you have a small leak in the system or the AC compressor has gone out. Suggest you try recharging the unit. Make sure you have the correct R-22 or 134A freeon. If this work for a few days then have the leak fixed, if this doesn't work replace the compressor. Check Ebay for the compressor i obtained one for $100.00. Cost $450 at Auto Zone.

Sounds like the heater and a/c blend door actuator. It is located under front center of dash below windshield. Dash must be removed to replace it. I've done it several times.

You need to check the AC unit under your dash. I suspect an issue with the fan. Either it is dirty, wires are loose or the fan is not working.

Well if the air not come cold it means that your Freon gas is over.. re-fill it.

Found the fix on another forum - replace the AC clutch relay in the power distribution box under the hood.

This has worked for at least two people with this exact problem so far.