2003 Chevrolet Monte Carlo car overheating. Heat not working

Tiny
CHADRJORGENSEN
  • MEMBER
  • 2003 CHEVROLET MONTE CARLO
  • 3.8L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 93,000 MILES
The heater blows out cold air. I can start the car and drive for about 8 to 10 minutes. The temperature then spikes way up to the red and the warning light comes on. Once the warning light came on I immediately turned the car off and I havent attempted to start or drive it again. I havent noticed any leaks or abnormal sounds. Just looking for suggestions as to what the problem may be. Thanks
Wednesday, December 11th, 2013 AT 1:54 PM

5 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Have you checked to make sure the coolant is full?
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Wednesday, December 11th, 2013 AT 2:02 PM
Tiny
CHADRJORGENSEN
  • MEMBER
  • 4 POSTS
Yes I added coolant thinking that would resolve the issue but that didn't help.
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Wednesday, December 11th, 2013 AT 2:08 PM
Tiny
SATURNTECH9
  • MECHANIC
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How low was it?When the engine is up to operating temp are both upper and lower radiator hoses too hot to hold?Is the radiator fan operating correctly?
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Wednesday, December 11th, 2013 AT 3:21 PM
Tiny
WINDSONG25
  • MEMBER
  • 4 POSTS
Could be the thermostat is stuck closed. That would make the engine run hot and no heat.
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Friday, May 23rd, 2014 AT 1:41 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
If the thermostat was stuck shut it should still have heat most cars have a heater bypass hose for the heater core.
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Friday, May 23rd, 2014 AT 3:40 PM

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