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Just bought my 07 Wrangler 4 dr two weeks ago. The A/C has started having issues. When it works, it blows good and cold. But some times it will not work at all. Turn the knob and it doesn't come on, no blower, nothing. Then a day later it is working again. What is going on with this??
 

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It sounds like a bad A/C / Heater Control Module. 07's have a basic system. The complete part is plug and play and less than $150.
 

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EDIT: Nevermind just saw that your blower is not working either, so that is probably not just a relay.

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Check if there is a relay for the AC clutch in the fusebox. Recently had the same issue on my Honda Civic (works off and on and when it works it blows cold) and it turned out to be a $7 relay. :)
 
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