Question about 1996 Nissan Altima

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Cooling fan inop

The cooling fans will not kick on, the only come on when you turn the a/c on or if you unplug the coolant sensor. i have replaced the coolant sensor. 2.4 motor

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Check if the sensor is driving the correct polarity cause this is an electrical supply fault your fan is ok try to check the polarity using a multimeter device

Posted on Oct 31, 2008

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Sounds like you may have a blown head gasket. Is your coolant level low and have you had to add coolant. Still sounds like you may have a cooling fan issue or maybe even a clogged radiator. what is the temperature difference from the inlet and the oulet of the radiatoe hoses? Anything less than 20 degrees and I would say the radiator is toast and you need a new one. And fix the cooling fan issue. But still dont rule out the blown head gasket especially if it over heated...

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