I'm using the 71C thermostat. Yes, in hot weather heavy traffic, the aux fan (single unit) kicks in at high speed to prevent the coolant temp from creeping to the top! It also keeps the temp from large fluctuations.
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Originally posted by jsmith
what thermostat are you using? the stock 87C one won't even be starting to open when your aux fans cut in. in summer or in heavy traffic i have to believe that your aux fans will be on all the time at high speed.
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