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Whats that fan I can hear at stoplights?

fan hear stoplights
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Whats that fan I can hear at stoplights?

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That fan is keeping the controller and (perhaps) the motor cool. It starts out slow and gets louder and faster as the temperature rises. As it gets louder, you are getting closer to having the “T” light come on. When that comes on, the controller will begin decreasing power to the motor, eventually preventing you from exceeding 30 mph, until the motor cools sufficiently.

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