1999 Geo Prizm Water Temperature Gauge Went Cooler While Driving On Freeway

1999 GEO PRIZM
200,000 MILES
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ANONYMOUS
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  • 1 POST
My water temperature gauge went cooler while I was driving on the freeway. It was cold outside and the heat coming out of the vents in the car got cooler. Is this the thermostat going bad?
Mar 20, 2013 at 2:21 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
It sounds like the thermostat is sticking open. That is the first thing I would check.
Mar 20, 2013 at 2:27 AM
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