1990 Volvo 740 radiator cooling fan mysteries
#2
The engine has not gotten hot enough yet - those come on at about 225 degrees. Put a piece of cardboard in front of the radiator (temporarily) to force the engine hotter - if the fan motor, switch, relay and fuse are good - it will come on about 220-230 degrees.
#3
#4
Later 940s use a temp sender in the cylinder head to control the fan - perhaps Mr.Chilton is referring to that. Those 940s do not have a belt driven fan (use the same water pump and pulley, w/ no fan attached) - just an electric one behind that radiator (rather than in front)
#5
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