Neither of my radiator cooling fans are working. I recently replaced my crankshaft position sensor and both camshaft position sensors, but I didn't disconnect anything related to the cooling fans. I'm not getting any OBD codes and Check Engine light.

Asked by GuruPWXDP Jan 16, 2020 at 12:38 PM about the 2006 Nissan Altima 3.5 SE

Question type: Maintenance & Repair

Radiator cooling fans stopped working

2 Answers


If you have no codes or CEL, maybe the car's not getting hot enough to need fans. Turn on the AC; fans come on by default with the AC. If fans run, you probably just have a defective engine coolant temperature sensor. If they don't, you have a blown fuse or relay, defective fan clutch or wiring, bad fan temperature switch, or bad fan motors.

2 people found this helpful.

Thank you, Ed92626. The fan does not run when I turn on the AC. I plan to test and possibly replace fan relay(s).

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