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Friday 11 May 2018 at 08:57
Quoted from YeOldPinPlayer:How did you determine the power supply turns on the fan at a specific temperature as opposed to after load x for time y or some other factor?
Testing would be easy with an inside/outside thermometer. Put the outside sensor under the PS cover and play for an hour, recording...
Source: http://pinside.com/pinball/forum/topic/replacing-stern-spike-noisy-ps-fans#post-4391910