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Radiator fans are not turning on

Tiny
ISRAELBALLEZA
  • MEMBER
  • 2007 CHEVROLET SILVERADO
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 158,000 MILES
Hello, I was driving and noticed my temperature rising at 210 and I worried because it stays at like 180 and noticed that when I was on the move it came down but when I was in Idle at a stop light it will go up again. Got home looked for leaks and noticed small leaks by the heater core outlet and got it fixed also flush my coolant, replaced some hoses that looked bad and also put in a new temp sensor. I turn on the truck check and noticed that my fan was not turning on. Turn the a/c to see if fans where working and they turn on, checked relays they seemed fine. Help
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Sunday, June 9th, 2019 AT 1:58 PM

2 Replies

Tiny
STEVE W.
  • MECHANIC
  • 12,973 POSTS
Welcome to 2CarPros. It sounds like the fans are working okay. They will not turn on low speed until the coolant temperature is 220 degrees. Then they switch to high speed around 225 degrees. If your engine is normally running around 180 I would check the thermostat, it should run normally at around 205-210 degrees.
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Sunday, June 9th, 2019 AT 2:51 PM
Tiny
ISRAELBALLEZA
  • MEMBER
  • 2 POSTS
Hi Steve, thanks for answered. I haven't got to it until today and I am installing a new thermostat. I will comment as soon as I get it done. Thanks again.
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Saturday, June 15th, 2019 AT 11:42 AM

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