What two sensors are being used with the Fluidyne radiator - part numbers please. Replacing original radiator and am already pre wired for the two temp. sensors. Last post I could find was a 2007 post by Sick Cat with Wahler part numbers. Anything different or newer? Would like to stay close to OE degrees.
I recommend you look into Pantera Electronics fan controller instead of switches. If you really want switches you only need one. Install it into the radiator leaving tank and wire to both relays. Forest
only ONE required on the lower outlet. IMPOTANT per "Sticky" to get the right combination on temp switch and Thermosdat.."sticky" has the correct information. Part number I leave to the US gurus... can get you Europe usual #, but NOT difficult... .
The Pantera Electronics fan controller uses Pulse Width Modulation to control the speed of the fans in proportion to coolant temp. With this system, your fans will run at a slower speed most of the time, than they would with a switch or switches. This is both quieter and easier on the fans. Also, if you have your fans mounted in a shroud, unless there's a baffle that separates the two fans, you shouldn't have the fans turn on at different temperatures. If they do, when one fan is on and the other is off, the one that's on will draw air through the other fan's opening in the shroud, rather than through the radiator. In such a case, the fans only pull air through the rad when both are on.
Agreed with the comments that one switch should control both fans. The switches below are chosen based on the premise that they shall be located in the radiator's inlet tank (the lower tank) so as to sense the coolant temperature regulated by the thermostat. They should give you fans which cycle on when needed & off when not needed, instead of being on all the time.
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