Thermostat

2006 ISUZU NPR
104,000 MILES • 2WD • AUTOMATIC
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SMOKEY19
  • MEMBER
  • 2 POSTS
My trucks temperature goes up when parked but when driving the temperature goes back to normal what does mean
Sep 9, 2016 at 12:47 PM
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CARADIODOC
  • ✓ASE Certified Mechanic
  • 34,321 POSTS
  • ASE Certified Mechanic
It means you're not getting sufficient air flow through the radiator at low speeds. That is due to an inoperative radiator fan. The fan isn't needed at higher speeds when natural air flow is all that's needed.
Sep 9, 2016 at 8:39 PM
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