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

2014 CHEVROLET SILVERADO
175,000 MILES • 4.3L • V6 • 2WD • AUTOMATIC
Avatar
MRWARREN
  • MEMBER
  • 1 POST
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.
Apr 19, 2025 at 7:27 AM
Advertisement
Avatar
STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
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.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Apr 20, 2025 at 11:25 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.