99 Pontiac Grand am gt

Asked by Adrian Aug 23, 2018 at 12:23 PM about the 1999 Pontiac Grand Am 2 Dr GT Coupe

Question type: Maintenance & Repair

I'm overheating fans aren't kicking on what all do I
need to check

2 Answers
30

3800engine answered 6 years ago

The cooling fans come on 2 ways, when ac is on or when the engine reaches about 220. If they dont come on when ac is on this shows its a fault with the brain failing to turn on the fans, not a fault with temp sensor. Try disconnecting battery and then disconnect leads to brain, then reconnect several times. This will clean the connectors and may correct the issue as they get corrosion on them. Hook battery back up and turn ac on to see if they work.

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GuruVQ3XV answered 6 years ago

Replace your cooling fan switch. I replaced my thermostat in my 97 and put in a new fan only to find out it still overheated. I did the disconnect of leads to check for corrosion but it still would not kick on the fan. Finally put in the switch and fan works perfect.

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