A re calibration may fix you up.
Blend door calibration procedure.
If your vehicle has manual controls a recalibration is not possible or needed.
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Before you give up and take it to a dealership try this re calibration procedure from sparky s.
The hvac control head uses its pre programmed logic and actuator endpoints to position the door correctly.
If you happen to have auto controls the temperature door recalibration is performed as usual but the fuse will be labeled rdo batt.
Motor calibration procedure for jeep grand cherokee 99 04 heatertreater.
Or remove the hvac ecas fuse for a minimum of 10 seconds.
The blend door diverts the airflow to the defroster vents in the upper dashboard the floor discharge for heat or the center vents for air conditioning.
A trouble code may set if the components start to wear and the endpoints drift too far from the pre programmed positions.
Then turn the key to the on position but don t start.
Most of these endpoints are calibrated during the relearn procedure.
Don t touch the hvac controls.
4 calibration should take about about 2 minutes to complete if you have heater control and about 20 seconds if you have automatic temp control system.
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Okay the only recalibration procedure is for a system that has auto controls.
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Re install the hvac ecas fuse.
But i did that and nothing happened at all.
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Gmc yukon and chevy tahoe blend door calibration.
Let them do whatever that want to do.
Heatertreater offers the ultimate solution to blend door repair.
It only applies to the temperature door actuator.
Try disconnecting the battery for a few minutes.
Does a fuse need to pulled battery need to be disconnected or did i not wait long enough.
5 if lights continue to flash after 3 minutes manual system or 20 seconds auto system the control unit has detected a failure.
My question is what is the proper re calibration procedure for the blend door actuator once everything is hooked up.
