no, the fans are temperature activated. all electric fans are.
no year car stated. so no real help.
cracks leak AF
and the level drops
air in water jacks are overheat , for sure.
check the rad level each dead cold, morning, at the filler neck on rad.
if it's low each day, there is a leak. inside or outside.
bad thermostat,
so it can be stuck open, stuck closed, be way off temp or stuck ,or just too slow, at anywhere, its 100% mechanical and do all that. at any time , and will.
on cars 1996 and newer in use we can plot the thermostat temp
with any scan tool. 180F or more is good.
here is my double bad thermostat. (I love the truly sick for photos)
http://www.fixkick.com/my96-16v/TP-MAF-VSS-ECT-FUEL.JPG
see that, it took like 20 miles to reach 160, (marked 180 onside)
so is too low and way too slow, causing engine ware, and wasted fuel.
id think 5 years is life span.
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