Question about 2003 Nissan Altima

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Compressor does not engage when ac is turned on.

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If the system is low or has no Freon, the clutch will not engage. Hook up a pressure tester on the low pressure line valve. It should read 30 psi at 65 degrees outside temperature and 50 psi at 85 degrees outside temperature. If there is pressure, then it could be a fuse or AC relay. If there is no pressure, then add freon with some pag oil, plus a leak dye will have to be added to the system from the low pressure valve. Only add 1 16 Oz. can to not over pressurize the system. If the clutch engages, then check for a leak. I would recommend taking this job to a qualified technician, since he would have the necessary equipment to put the system at a vacuum of -30- To empty the system and check for a leak.

Posted on Apr 16, 2014

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Get someone to check to see what you have for pressure inside the system. The freon may have leaked out over the winter.

Posted on Apr 16, 2014

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