Question about 1995 Cadillac DeVille

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Heater works on the driver sid refrigation on passenger side 1997 deville where can i look for the problem

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Hello: You have a temp actuator that is not working. Remove the glove box and the panel under the dash on the passenger side. You will see the heater/A/C Module (Box) On the top and bottom you will see two silver linkages, they come from the actuators that are mounted on top and bottom of the heat/A/C programmer. If you will turn key on, engine off, make sure the control head is in the on position. move the temperature from 60 to 90 and watch the actuator arms, the one that doesn't move is the failed one. The actuators are held in place with two 7mm screws and one electrical connector. The silver linkage snaps on the air mix door linkage and slides on the actuator end. The actuator has to be set to engage it with the programmer drive, to do this turn key on and hold actuator over the drive end of the programmer, when lined up it will slip on.

Posted on Nov 14, 2010

Testimonial: "'Thqnk you' the info will fix my heater and i will be able to drive my cad i am amazed as we have a manuel and it dosent tell us much "

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The heater and A/C programmer supplies voltage to an internal motor that drives the air mix door. The heater and A/C programmer monitors the air mix door position feedback from a sensor on the motor. If the air mix door is requested to move but the feedback voltage does not change, the heater and A/C programmer will store DTC B1340. If the air mix door feedback indicates that the feedback is near the hot or the cold extreme, the DTC will not set. Evaluate the operation of the air mix door through self diagnostics as described in the test description.
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Did you perform the Diagnostic System Check?
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Go to Step 2
Go to Diagnostic System Check
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