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A/C not working please help

1327 Views 4 Replies 5 Participants Last post by  fulltimer50
Hi guys

I rencently drove to Montana from San Diego CA my A/C and fan were working fine but when I arrived in MT my A/C stopped working and has not worked since what could be the problem? My truck has 60,0000 miles. Also when I turn the know from A/C to off it still makes the hissing sound. /ubbthreads/images/graemlins/shrug.gif

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You might want to hook up a set of gauges to see what kind of pressure you are running. If it is above 40 psi on the low side and above 350 on the high side, I would say it is time to have the a/c re-serviced. You could possibly have a little air in the system if you have a leak. I should run around 20 on the low side and 300 on the high side. This is just a guess. If there is a air-conditioner expert out there, lend a hand.
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