![]() ![]() With one-way hysteresis enabled, the fan controller only drops the fan speed when the hysteresis threshold is reached. The problem happens when you reach the bottom of the fan curve. When the temperature reaches a point which corresponds to the lowest fan speed, the controller always drops to that speed, even if the actual hysteresis threshold hasn't been reached yet. For example, when this sensor heats up to 37 C, it will output a fan speed of 44%. It can go down to 36 C, and the fan speed will stay the same, but once it reaches 35 C, the fan speed will drop to 30%, even though the hysteresis threshold should be 34 C.
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