Temp gauge goes from normal to H then back to normal within seconds.

Asked by Fluff61 Jun 25, 2018 at 12:57 AM about the 2007 Ford Explorer XLT

Question type: Maintenance & Repair

I have a 2007 Ford Explorer.  The temp gauge goes
from normal to H then back to normal while I am
driving it.  Coolant level is good, water pump has
been replaced, thermostat has been changed.  
Help!

2 Answers

F_O_R answered 6 years ago

Possible air in the system. Try purging the cooling system.

3 people found this helpful.
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Guru9Z1229 answered 3 years ago

Today, my temp gauge goes from normal when the engine is cold to H after the engine starts, but has not warmed up. When I disconnect the temp gauge wire from the sensor, the gauge goes to zero-no temp reading. Any thoughts? Coolant level is good and new thermostat. Fan operates, no hard start or smoke.

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