This is concerning the A/C on my Xterra.

When I turn the A/C on, it doesn't blow cold. After a while (2 minutes) it starts getting cold. Then the temperature of the air out of the vent starts to fluctuate - it gets nice and cold as it should be and a couple of minutes later, the temp of air out the vent goes up then back down again.

Just wondering what is going on - is the system just low on freon or is the compressor not able to keep up or is the belt slipping?

Thanks.

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1986 300E (3/2002) Rear ended and totaled (10/2009)
2000 Xterra (5/2000)
1992 400E (11/2009) -Sold
1986 300E (12/2009) - Sold
2004 E500 Wagon (6/2013) - Sold