how to fix a/c
Usually if a/c is not coming through vents you have a vacuum hose problem...usually easy to track down and replace....engine fans? You mean the main fan...could be a relay switch or bad belts...cannot help without more info.
check the fuses
look under the passenger glovebox take the plastic cover off and if the fan does not work then its time for a new one or a junk yard one but sometimes the junk yard ones are no good either so best to buy a new one but like the other said check your fuses if there good its the fan or fan motor its really a easy fix
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