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I have a 2005 Chevy Cobalt; its heater works fine, but AC doesn't seem to work at all. Fan works, but even at cooling set to max it just blows room temperature air. What could be the reason?

Thanks!

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up vote 3 down vote accepted

The most likely causes are a freon leak or a broken drive belt. Frequently the leak is from an "O" ring on the back of the compressor. You can buy recharge kits at auto supply stores that are designed for the DIYers. My experience has been that if you are not familiar with the system it might not be cost effective. It will usually take two and sometimes three kits to find the leak. If you shop around you can find a shop that might be able to fix it for the same cost.

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I appreciate the advice, I will give it a try and if this is above me I will take it to the shop –  Yuriy Galanter Jun 22 '12 at 14:04
    
@YuriyGalanter Any updates? –  Mark Johnson Sep 12 '13 at 21:15
    
Had to take it to the shop after all, cost me $500 to fix, but it is working now –  Yuriy Galanter Sep 12 '13 at 21:19
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