overheating 99 civic.... on 1999 Honda Civic

I flushed radiator, new therm.,fan relay switch, fan still didnt always work so i wired straight to battery. Polarity,(direction of blades), differs. Could it be a sensor, the one near the therm? Should cooling fan Blow air into radiator or pull and blow air into block area?

Asked by for the 1999 Honda Civic
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