Your vehicle should be under 3/36 bumber to bumber warranty. But as you explaination on the problem it unclear.Is the noise only one when you have your AC on or is the noise there when the blower motor running?And what type of noise is it, clicking, scrapping, wirling?If it was me I would take it to a differrent dealer and get the second opion on it.If I can get some more info them I would help diagnos the problem.