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Q: Engine overheating on 1993 Nissan Quest

My Nissan Quest is overheating. I'm not losing coolant and there's no water in my oil. I've tried to eliminate all the obvious things that cause overheating. I noticed that my fan is not working when the car gets hot. Have I figured it out? Is there anything I should check on the electric fan? Is it a job I can do? I've always worked on my cars if it was a simple job.
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It may be the fan motor. Or the fan relay. Or the thermostat. You run a bit of a risk of trying one thing after another without some diagnostic equipment and expertise. None of these jobs is huge, but you'll still want a repair manual or something.
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