2002 Pontiac Grand Prix Heat On Will Cold Temp Gauge Starts Rise Almost Over

2002 PONTIAC GRAND PRIX
82,000 MILES
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SP1100
  • MEMBER
  • 3 POSTS
When heat is on it will go cold and temp gauge starts to rise and almost over heat and then drops again and heat is hot and then same thing again. Can you please help with an answer why or what is causing this. Thank you for your time.
Nov 9, 2012 at 6:26 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
It could be a couple things. First make sure the coolant is full. If it is, then check the thermostat.
Nov 9, 2012 at 6:41 AM
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SP1100
  • MEMBER
  • 3 POSTS
Ok I will, thank you so much for your time, I will make this my #1 web site! Thanks again!
Nov 9, 2012 at 6:47 AM
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