Fan noise

2012 GMC ACADIA
130,000 MILES • 3.6L • 6 CYL • 2WD • AUTOMATIC
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SAMINOU
  • MEMBER
  • 1 POST
i can hear a fan noise. This noise can happen when AC is off or on. So I am sure it is not the AC fan. I need your help.
Jan 22, 2018 at 2:25 PM
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STEVE W.
  • ✓Experienced Mechanic
  • 15,408 POSTS
Where do you hear the noise? inside the car or outside? If it is the cooling fan on the radiator and it is staying on even with a cold engine it could be a faulty coolant temperature sending unit, bad fan controller or faulty fan relay. To actually test them and determine where the fault is you need a scan tool that can read the live data from the sensors and that can activate the fan control relay.
Jan 23, 2018 at 1:41 AM
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