jim beam wrote in news:vbmdnY7SW9Ya0z3WnZ2dnUVZ_hs snipped-for-privacy@speakeasy.net:
I'm not so sure of that.
The Honda rad-fan system has the fan OFF unless everything is absolutely correct. This means that the slightest thing that goes wrong results in an inop fan, and overheating is the consequence.
Toyota has a better system: the slightest thing that goes wrong has the rad-fan ON all the time. Impossible to overheat on account of an inop rad fan.
All North-American-market cars since about 1990 have the system you describe. Hot-side thermostats went out with carburetors.