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Check the operation of the selector switch Check for a vacuum leak either under the hood or under the dash Check the operation of the vacuum actuated motors under dash

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Q: Heater in your 2000 jeep wrangler works on blowing upper and lower but not on defrost or any of the other settings --what happened?
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97 jeep wrangler that the ac is blowing out the defrost vent but not the regular ac vent how can this be fixed?

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