Fan radiator ta fiye yana idafa a cikin rubutu suka yi, ya kamata speed-ina daidai don samun hanyar taimakon engine. Fan ta fiye mai idafa shi ya kira daga thermostate, ko kuma amma suna aka sami daga Electronic Control Unit (ECU) ya kamata samun hanyar taimako engine, load na engine, ko wani hanyar variables. ECU ya sake samun inforamuwonan dai dai, ya kamata ake zama voltage a cikin motor fan, ko speed na motor fan ya kira daga feedback drive system. Suna model mai idaka kuma ya kasance option na adjustment manual mai saita speed-ina a iya sake sami daga driver ko mechanic kuma ya kamata. Fans ta fiye ne idafa da system mai samar hanyar kuma ya kamata ayyuka economy na kerosini don fan ya yi baya, samun hanyar temperature na engine ya kara babban dogon gaba, ko engine noise ya zo baya compared to fans na speed na fix.