Question about 2002 Nissan Altima

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My 04 Altima 2.5S AC compressor wont engage, I took it to an AC shop and he told me he checked the pressure and everything is ok... no leaks. the compressor is not getting any power as well as the radiator fans. all controls and blowers work fine.... what is the problem???

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You would need a shop manual for the wiring diagram for the ac to troubleshoot it.
There is a low pressure switch and a relay involved that could prevent the clutch from getting power. The radiator fan runs when the ac is running and high pressure is above 200 psi.

Posted on Jan 09, 2013

Testimonial: "the problem was with the relay "

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