Question about 1998 Dodge Caravan

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Changed batteryand now the hvac lites are on - 1998 Dodge Caravan

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You need to recalibrate the climate control system.

  • Start the van.
  • Slide the temperature lever all the way to the left (full cold).
  • Turn the Mode Control to 'panel' (the one that sends air to your face only).
  • Turn the 'blower switch' to all the way to full.
  • Now go to the leftmost three buttons. Press and hold the top one (rear wiper on constant) and the bottom one (rear wiper washer fluid) until the lights come on solid then begin to flash, and then you can let go.
  • The AC will now calibrate. You will feel the air blow out of all the different zones at different intervals and see lights come on and go off. Then after a minute or two the top button you pressed will be slowly flashing. This means it has been completed.
  • Press the last flashing button and you are done.

Posted on Jan 02, 2011

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Posted on Jan 02, 2017

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HVAC mode selector does not work and displays a continuously changing condition


Do you have manual or automatic HVAC system ?
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May 14, 2016 | 1999 Oldsmobile Intrigue

1 Answer

My heater is stuck on the windshield and floor what actuator needs to be changed


Air Distribution
The HVAC control module controls the distribution of air by the use of a defrost actuator and a mode actuator. The modes that may be selected are:
?€¢
Defrost


?€¢
Defog


?€¢
Panel


?€¢
Bi-Level


?€¢
Floor

The mode and defrost actuators are connected to the mode and defrost doors by a cam type linkage system. Depending on the position of the door, air is directed through the HVAC module and distributed through various ducts leading to the outlets in the dash. If the HVAC control module detects a fault with the mode or defrost doors the HVAC control module will try to drive the actuator for a predetermined amount of time, to defrost, which is the defaulted position for the mode and defrost door actuators. When the mode switch is placed in the defrost or defog positions the A/C is commanded on and the recirculation door is moved to the outside air position to help reduce window fogging. A/C is available in all modes and recirculation is only available in the panel and bi-level modes.
Circuit Description The following DTCs are for the HVAC door actuators: ?€¢
B0248 is for the defrost actuator.
?€¢
B0263 is for the mode actuator.
?€¢
B0408 is for the left air temperature actuator.
?€¢
B0418 is for the right air temperature actuator.
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Did you perform the HVAC Diagnostic System Check?
Go to Step 2
Go to Diagnostic System Check - HVAC Systems - Manual

2

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, command the appropriate HVAC door actuator ON and OFF while observing the corresponding Door Actual parameter.
Does the scan tool indicate that the value of the appropriate Door Actual parameter changes?
Go to Diagnostic Aids
Go to Step 3

I would

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Heater Core Removal & Installation Heater core removal gm-10-00-589.gif

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Oct 18, 2010 | 2000 Chevrolet Silverado 1500

1 Answer

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If this does not solve the problem, then the HVAC system will need to be troubleshot.

Sep 07, 2010 | 2004 Chevrolet TrailBlazer

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