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<blockquote data-quote="Davy Crockett" data-source="post: 41684" data-attributes="member: 367"> &quot;some times it works fine, but most of the time it has a hissing sound and isn't blowing cold air.&quot; &quot;The hissing sound seems to be coming from the dash or behind the dash area&quot;From what I gather reading these sentences there is a good chance you have a vacuum switch or vacuum line issue but one trick worth trying is hold down the inside temperature button all the way as hot as it will go and then as cold as it will go and cycle it back and forth a couple times. I had a GM car that I had to do that about twice a year.&nbsp;&nbsp; FWIW, At least in the &quot;olden days&quot;,&nbsp; If air conditioning worked fine sometimes but wouldn't work most of the time it meant the expensive parts were doing their job.&nbsp;&nbsp; </blockquote>

[QUOTE="Davy Crockett, post: 41684, member: 367"] [COLOR=#333333] "some times it works fine, but most of the time it has a hissing sound and isn't blowing cold air." [/COLOR][COLOR=#333333] "The hissing sound seems to be coming from the dash or behind the dash area"[/COLOR] [COLOR=#333333]From what I gather reading these sentences there is a good chance you have a vacuum switch or vacuum line issue but one trick worth trying is hold down the inside temperature button all the way as hot as it will go and then as cold as it will go and cycle it back and forth a couple times. I had a GM car that I had to do that about twice a year. FWIW, At least in the "olden days", If air conditioning worked fine sometimes but wouldn't work most of the time it meant the expensive parts were doing their job. [/COLOR] [/QUOTE]

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