1991 Cadillac Deville - Fans come on every key turn, even with engine off

Asked by Derek Jul 01, 2019 at 03:45 PM about the 1991 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

Is this normal? Radiator/Cooling fans kick on/stay on with key turn. Even with
engine off and key turn just enough for aux power, the fans run.

1 Answer
103,215

KenF answered 5 years ago

Check your fan relay, fan controller/engine coolant temp sensor, most likely one of the electronic controls for the fan assembly is bad and the fan is running all the time by default to prevent overheating.

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