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Re: Trinary and 3 relay electric fan questions
Oem and aftermarket PWM controllers only bring the fan/fans up 40-50% with a cooling call. Of course highest call for cooling takes preference. So if engine wants more cooling, fan will speed up. See no reason to run fans on high with a cooling call only. Am using PWM myself. If I was using a two speed setup my fans would come on at low with cooling.
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