Question about 1995 Lincoln Town Car

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1995 lincoln town car heater

When i use the heat it only heats at it highest temp digital read out moves through its settings ok and all vacum servos seem to open and close when the different buttons are pressed but the hot air from any vent setting will not blow a medium temp only very hot. when max ac button is pushed the door behind glove box and in heater box will open all the way but but hot heat blows out ac vents.the ac compressor cycles on and off too quickly so i suppose it needs recharged but i think the heat should cool down when mixed with colder air.so i dont think its mixing with cold air in the heater box. where do i look for the dooor that mixes hot and cold air to make medium heat.? thanks

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  • 4,369 Answers

The door opening & closing on Max a/c is the inside/outside air intake door.
The temp blend door is the one you are concernd about. It says you have to remove instrument panel for access. ouch!!!

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A/C Electronic Door Actuator Motor
The A/C electronic door actuator motor (19E616) is located on top of the A/C evaporator core housing assembly.

  • Its function is to move the A/C air temperature control door on command from the control assembly.
  • The A/C electronic door actuator motor contains a reversible electric motor and a potentiometer. The potentiometer wiper is connected to the actuator output shaft and moves with the output shaft to indicate the position of the A/C air temperature control door.
  • Battery voltage is applied to the ends of the potentiometer. The voltage available at the wiper indicates the position of the potentiometer. The actuator wiper voltage is sent to the control module and matched with the wiper voltage of the module potentiometer. The printed circuit board then drives the actuator motor in the direction necessary to make the actuator wiper voltage agree with the control module wiper voltage.
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Posted on Mar 21, 2009

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What would cause the heater to blow cold almost all the time on a 1993 Lincoln Town car?


If it is as you read the door control will be activated by a vacuum unit . Check for hoses that are missing cracked or broken. Move the control fro heat to cold and see if the door moves. The next thing to check is if the thermostat is not stuck open. Start the engine cold and see if the top radiator runs cold for say 10 minutes after which the hose should noticeably get hot quickly.

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Other causes of no heat in the cabin are engine thermostats that are stuck open (engine runs cold) or air bubbles in the cooling system.

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I am not getting warm air in my 1999 escalade


I would say either blend door issues or a vacuum control valve, heater control valve or a vacuum hose to the heater system is leaking. I would start to suggest. You are correct in checking the blend door. A computer scan should tell you what temp the climate control thinks it is in the passenger compartment. It may be a thermostat problem giving the climate control a false reading. Your blend door is controlled by a servo motor under the dash. You can remove the servo and watch to see if it moves when you change the temp setting from heat to cool. Also, you should be able to manually move the door to the heat position and see if you get heat.

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