It s probably the heat a c blend door actuator it s either failed or missing teeth.
2002 jeep wrangler blend door actuator location.
Equip cars trucks suvs with 2002 jeep wrangler a c heater blend door actuator from autozone.
Blend door actuator locations begin by identifying the problem either defrost mid or floor or temperature modes not working.
Then locate and identify the actuator to be replaced.
Move the key to the off position.
Do you hear rapid clacking clicking under your jk jku steering column.
The blend door actuator is a reversible 12 volt direct current dc servo motor which mechanically positions the blend air door.
Blend door actuator calibration.
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Open hood bonnet for the rhd guys and locate fuse 15 in the fuse box next to the battery.
These units can be either hanging in front of you or in a little more obscure places such as on the side the hvac plenum.
They tried what they could but were of the opinion that the actuator needs to be calibrated at a jeep dealership or someone with the proper scanner calibrator tool because they feel that the actuator is continuing to spin in one direction and they tried to.
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Blend door actuator motor calibration turn ignition key to the on position and turn on the hvac system.
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The blend door actuator is located on the top of the hvac housing.