Temperature gague stays on hot.

Tiny
FREDSRAIDERS
  • MEMBER
  • 1997 FORD F-150
  • 4.6L
  • V6
  • 4WD
  • 170,000 MILES
I have replaced the thermostat, temperature sensor and radiator due to a bad leak. But my temperature gague goes up to hot as soon as I turn the truck on. What is my possible problem? Or solution?
Tuesday, April 18th, 2017 AT 7:31 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,760 POSTS
The wire to the coolant temperature sensor is grounded. That's a red / white wire. There should also be a diagnostic fault code set in the Engine Computer related to "Coolant temperature sensor voltage too low". On most vehicles that code will also turn on the Check Engine light.
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Tuesday, April 18th, 2017 AT 8:26 PM

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