While driving, the electric fan (radiator) will start running?

Tiny
MRWARREN
  • MEMBER
  • 2014 CHEVROLET SILVERADO
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
Intermittent issue. While driving, the electric fan (radiator) will start running, the temperature gauge drops (doesn't register a temperature) and, if the A/C is on, stops cooling. Still blows but not cool as if the compressor kicks off.
I can disconnect the battery ground and reconnect it. Then everything operates normal. I then have to reset some of my radio settings.
Lately, this issue has been happening more frequently.
Saturday, April 19th, 2025 AT 7:27 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,217 POSTS
It sounds like the engine coolant sensor is going bad and making the PCM think the engine is overheating. We might want to do a CAN scan which this video will show you how:

https://youtu.be/u-4syLc-ifQ

Here is the location of the sensor so you can swap it out. Check out the images (below). Let us know how it goes.
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Sunday, April 20th, 2025 AT 11:25 AM

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