Hey guys I have a 2002 maxima. Last summer I recharged my a/c system and it was working great and was told there are no leaks in the system . Now that it's getting warmer I turn on my a/c and it's blowing warm air and I check the compressor and it won't turn on. What could be the problem?

Thanks in advance

 

There is a pressure sensing switch for the refrigerant in the compressor. So if the refrigerant has leaked out, the compressor will not run. This is the most common problem.

 

+1

Guess what happened on my 5.7 swap this winter b/c I reused the O rings... It didn't all leak out, but I have oil all over the compressor.

 

You definitely have a leak. The biggest misconception when it comes to a/c refridgerant that people think it "runs out" which is a myth. since the system stays in the a/c unit and should not "run out" only way it would is a leak or opening the a/c system. Same principle to a home refrigerator, ever see one that "run out of freon" that ran for decades at most. Only other thing is a compressor can fail due to lack of lubrication, a.k.a oil or just sitting there not running the a/c for a very very very long time cause to seized up.

 

A mechanic had checked for leaks and it didnt have any leaks and the a/c was working all summer and i normally turn the a/c on at times when it rains.

 

That was several months ago. Plus, everything shrinks with colder temps (a problem if the seals are near failure).

Get a set of gauges and check the pressure or see if he'll check it for free (only takes 30 secs).