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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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I just changed my hot and cold blend door motor, the dealer Said I need to bring it into them to recalibrate is this true or false how can I do this on my own


Actuator Recalibration
Important: Do not adjust any controls on the HVAC control module while the HVAC control module is self-calibrating. If interrupted, improper HVAC performance will result.
Alternate Method (w/o Scan Tool)
Clear all DTCs.
Place the ignition switch to the OFF position.
Install the HVAC actuator.
Connect all previously disconnected components.
Remove the HVAC/ECAS fuse for a minimum of 10 seconds.
Install the HVAC/ECAS fuse.
Start the vehicle.
Wait 40 seconds for the HVAC control module to self-calibrate.
Verify that no DTCs have set as current DTCs.

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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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bbbind.com has free wiring diagrams.
front blower motor-tok35otjw1i5wfk2bhubzpce-1-1.jpg

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

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