Cooling fan does not turn on

2007 KIA AMANTI

99,000 MILES

ALEXEI NIKOLAYEVICH

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15 POSTS
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And casually I have another problem with my cooling system.
My radiator fan doesn't turn on, and one round trip 20 miles, the car got overheated.
After that, it turned out the fan doesn't turn "on" when overheating.
I connected the fans directly to the battery, and both fans worked.
After that I checked the system turning on A/C, same results, the fan didn't start.
Now I want to check the fan circuit, but I don't know the location of the relays responsible for the fan operation?
If possible could you give me an idea where can I start to find the reasons for not working fans? Thank you.

Sep 13, 2021 at 3:15 AM

SQM

CERTIFIED EXPERT
6,383 POSTS

Hello,

Anytime you have an inoperative fan the first item to check the fan relay. Since you know the fans are good then the fans are not working due to not getting power to them. A bad relay will keep the fans from working.
The relay is located under the hood (see picture below).
Check for any corrosion or burnt pin(s). You can also test the relay.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the relay is good then the next item to check is the coolant temperature sensor. A faulty sensor may not send signal to the ECM to start the fan when the engine is at the operating temperature.

https://www.2carpros.com/articles/how-a-coolant-temperature-sensor-works
https://www.2carpros.com/articles/symptoms-of-a-bad-coolant-temperature-sensor

Please let me know what you find or if you have any questions.
Thank you.

Images (Click to enlarge)

Sep 13, 2021 at 6:17 AM

ALEXEI NIKOLAYEVICH

MEMBER
15 POSTS

Mechanic told relays in box not for a fan, but 1st pic. showing exact location of E-11 fan relay. Now i will tack a look of it. thanks a lot .

Sep 22, 2021 at 1:52 PM

SQM

CERTIFIED EXPERT
6,383 POSTS

You are welcome. Let me know how it turns out.

Sep 22, 2021 at 2:05 PM