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Author Topic: cooling fans behaving strangely  (Read 4070 times)
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bikemanbrent
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« on: May 30, 2013, 08:31:33 AM »

I'm sure this is a common problem. My engine cooling fans will only work if thew AC is on.
What is the cause /fix for this little gem of electrical grief?
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Pontiac6KSTEAWD
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« Reply #1 on: June 03, 2013, 11:53:40 AM »

Are you positive about that? GM has always had the strangest parameters for fan times to operate. They will usually pop on around 220-230 degrees. Near the 3/4 mark on your temp guage.
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Brian - Carpe Diem

01 Pontiac Aztek GT OPT AWD 121k - 04 GMC Envoy XUV 182k - 05 Mercury Montego Premier AWD 52k (wrecked)

neopostman
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« Reply #2 on: June 24, 2013, 04:46:59 AM »

Mine runs when the ac is on or pops on when the temp gets to about the 5/8 mark on the temp meter. Thats the way it's suppose too work.
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Jailor
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« Reply #3 on: May 12, 2021, 11:26:24 AM »

I did a joe mcgee and rigged up a radio frequency  remote control to turn on the larger radiator fan whenever I drive the car.  I modified the fan relay with solder and wires and a 12 volt relay to supply power to the fan motor.  Keeps the vehicle running cooler than normal and Iím thinking that is a good thing.  If you try this you have to leave the factory fan relay coil in the circuit otherwise it will throw a code.  Donít forget to turn off the darned fan when you reach your destination or you might be gifting yourself with a dead battery in a few hours!
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