Nissan Repair Questions? Ask a Mechanic for Answers ASAP
First, go to the 2 wires under the dash on that side that go to the blower. There is just a 2 wire connector there. Wiggle those 2 and see if they will make the blower kick on and off. If it's just those 2, then chances are good it's in the connector at the blower. Sometimes you can just push the wires in and it will resolve the issue. They just aren't tight on the plug. These are bigger wires and a larger plug, so they might wiggle loose. If there isn't any change, then go to the resistor. It's mounted more towards the back and is 4 wires. Make sure they are tight. If they are, then it's likely the resistor itself.
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Ok, you probably don't have to replace anything unless the plug on the blower side is broken. What I would do here is unplug it, then take a very small screwdriver and see if you can sort of pinch the wires inside the connector a bit tighter. That way when you plug it back in it should make better contact on the blower and solve the problem.
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