Secondary cooling fan and the AC? - GMC Acadia Forum: AcadiaForum.net
 
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post #1 of 5 (permalink) Old 05-11-2019, 04:36 PM Thread Starter
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Secondary cooling fan and the AC?

We bought our Acadia in the winter and have had no issues thankfully. But it's getting hot out and we started using the AC. I am noticing that when the AC is in use the car temp rises to around 220+. The temp gauge has never moved before and when the AC is not on the needle doesn't move. I also noticed that when I turn the AC on the second fan does not turn on. What does this all mean? Thanks for the help.
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post #2 of 5 (permalink) Old 05-11-2019, 04:59 PM
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First thing to do is check the coolant level at the radiator and make sure the cooling system is full. Second, check the fan relays. Third, download the factory service manual and troubleshoot the problem. You'll find a link to download the manual in another thread on the forum. The year might not be the same, but info in the document should help you. If you're not a DIY individual, seek help from a tech familiar with the car.

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post #3 of 5 (permalink) Old 05-12-2019, 12:25 AM Thread Starter
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For anyone for comes across this post, it turned out "Fan3" a 40A jcase fuse under the hood was blown. Replacing that fixed the fan issue. Thanks again for the help.
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post #4 of 5 (permalink) Old 05-12-2019, 07:49 AM
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Originally Posted by justin210485 View Post
For anyone for comes across this post, it turned out "Fan3" a 40A jcase fuse under the hood was blown. Replacing that fixed the fan issue. Thanks again for the help.
Good to know. Keep a watch on that for a while. Fuses don't blow without a reason to do so. It's possible the fuse was just weak, but there could be another underlying cause.

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post #5 of 5 (permalink) Old 05-12-2019, 09:21 AM
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Originally Posted by speleos View Post
Good to know. Keep a watch on that for a while. Fuses don't blow without a reason to do so. It's possible the fuse was just weak, but there could be another underlying cause.
That was my first thought.....what blew a 40 amp fuse?
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