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Radiator fan only works when A/C is turned on, the coolant sensor is not working?

Tiny
MARTINSRAV
  • MEMBER
  • 2020 TOYOTA RAV4
  • 2.1L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 64,000 MILES
Replaced engine bypass coolant valve, bled the air out. No leaks in the system. I'm thinking the coolant sensor isn't working. Is it a separate part from the fan and where is it located? If that's the problem?
Tuesday, August 30th, 2022 AT 3:39 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,935 POSTS
This sounds like the coolant sensor has gone bad. Here is the location so you can change it out or have the work done. You can scan the car to see if the sensor is bad or if any codes come up. Also, I have included the cooling fan wiring diagrams so you can see how the system works. Check the images below.
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Wednesday, August 31st, 2022 AT 7:16 AM

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