Town Car V8-4.6L VIN W (1997)
Control Assembly: Description and Operation
The EATC assembly is located in the instrument panel and consists of:
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eleven push buttons
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a variable blower speed control wheel for manual input
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a vacuum fluorescent display for displaying set temperature, ambient temperature, function and DTCs.
When the system is operating under AUTOMATIC control, the VFD will show AUTO and the preferred or target temperature to which the elements of
the automatic control system respond.
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A/C blower motor speed, under automatic control, varies in response to ambient temperature changes and a predetermined delay factor.
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Temperature may be increased or decreased in one degree increments between 18°C (65°F) and 29°C (85 °F) by pressing the red button to
increase or the blue button to decrease the desired temperature. The system will respond accordingly.
Other control assembly features include:
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a 16°C (60°F) setting for maximum cool and a 32°C (90°F) setting for maximum heat.
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an OUTSIDE TEMP button which, when pressed, will display the air temperature outside the vehicle.
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an OFF button which, if pressed, will apply vacuum to close the A/C air inlet duct door, shut off A/C blower motor operation and discontinue
climate control functions except OUTSIDE TEMP
When the thumbwheel control for the blower motor is rotated out of the position it occupied under automatic control, it will remain under manual control
until the automatic button is pressed.
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Under automatic control, A/C blower motor speed varies as required to accommodate the total automatic functions in the system.
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Under manual control, A/C blower motor speed is constant based on the thumbwheel setting.
The Town Car also has a pair of optional remote control buttons located on the steering wheel right spoke.
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These buttons, marked TEMP and FAN, can be used in addition to the control assembly buttons to change system settings during system
operation.
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The left button marked TEMP can be used to increase or decrease the set temperature. Depressing the TEMP up button will increase the set
temperature and depressing the TEMP down button will lower the set temperature.
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The right button, marked FAN, operates to override automatic blower speed control operation or to increase or decrease the manually controlled
blower speed. Depressing the FAN up button and releasing will increase the blower speed. Depressing the FAN down button will lower the blower
speed.
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To return to automatic blower speed control operation, push the AUTOMATIC button on the EATC Control Assembly.
