Why are the radiator fans not turning on?

Tiny
AWESTON
  • MEMBER
  • 2001 TOYOTA CAMRY
  • 4 CYL
  • 2WD
  • MANUAL
  • 25,000 MILES
Why don't my radiator fans turn on?
Sunday, July 13th, 2008 AT 1:00 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
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.
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Saturday, January 29th, 2022 AT 8:30 PM

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