Coolant fan not operating automatically

Tiny
EDDOTSON
  • MEMBER
  • 1994 SATURN SC2
  • 1.9L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 90,000 MILES
Coolant fan is not operating automatically. It has a new temperature sending unit.
Wednesday, December 20th, 2017 AT 8:26 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,752 POSTS
Unplug the two-wire coolant temperature sensor while the ignition switch is on. The engine computer should turn the radiator fan on by default. If it does, the system is working. A lot of GM engines have to get uncommonly hot before the fan turns on, possibly as high as 226 degrees.
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Thursday, December 21st, 2017 AT 4:58 PM

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