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Message: <blockquote data-quote="ALBundy" data-source="post: 36948" data-attributes="member: 15"><p>Bro, the electric fan is a two speed fan. It will move into high speed when1) engine temp is hot 2) refrigerant pressure is high. As such, there are two electrical/pressure switches, 1) at the side of the radiator and 2) near the compressor, on the refrigerant line/pipe.When the compressor is compressing the refrigerant and pressure is high, it will trigger the pressure switch which will cause the fan to run at high speed, similarly for the switch near the radiator. If your resistor is fine, then check these two switches! If wanna save some $$$, get the mercedes ones and apparently they also last longer.Hope this helps.Al</p></blockquote><p></p>