Why are the radiator fans not turning on?

2001 TOYOTA CAMRY
25,000 MILES • 4 CYL • 2WD • MANUAL
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AWESTON
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  • 1 POST
Why don't my radiator fans turn on?
Jul 13, 2008 at 1:00 PM
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SQM
  • ASE Certified Mechanic
  • 6,383 POSTS
  • ASE Certified Mechanic
Hello,

First of all, the radiator fan should turn on when the engine reaches its operating temperature. It also turns on when the A/C is on.

An inoperative radiator fan can be due to a bad relay, faulty wiring, defective coolant temperature sensor or a bad fan motor.

https://www.2carpros.com/articles/how-an-electric-cooling-fan-works

First check the relay. This vehicle has 3 relays for the cooling fan. They are located in the under-hood fuse box.

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

I have attached diagrams on how to test the relays as well as the temperature sensor and the fan replacement procedure below for your reference.

Please let me know if you have any questions.
Thank you.
Jan 29, 2022 at 8:30 PM
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