Thank you very much but I solved the problem today. I took the radio out and behind it there is a housed control unit and taking that out and taking it apart I discovered that the gear mechanism, which is made of plastic, is worn flat on one side, therefore this prevents the door in the heater duct from being closed to redirect the hot air to the proper outlets.
Thanks again
Chuck
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I have dodge caliber 2007. Fan is not blowing on lelvel 1 2 and 3. it is blowing on level 4.
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