The fan is electric. 40% is okay for blocking, and temp should trigger the fan. On long hills temps will jump a bit. In such a situation you might turn the cabin heater on full blast. Also, on my 1998 a setting that helps a lot in normal conditions and uses no energy: temp selector on hot, fan off, internal air circulation selected. Amazingly, the coolant runs thrpough the cabin heat exchanger but the hot air does not come into the cabin.
Do you have a way to monitor temps accurately (not the OEM gauge)?
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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