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1998 Pontiac Sunfire no heat

Tiny
WISHMASTER27
  • MEMBER
  • 1998 PONTIAC SUNFIRE
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 170,000 MILES
My car has heat when i'm doing 35 and under but any thing over that I have no heat. What would make that happen
Wednesday, December 9th, 2009 AT 8:34 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the coolant level and replace the thermostat and see what happens, also check the heater core
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Wednesday, December 9th, 2009 AT 8:47 PM
Tiny
WISHMASTER27
  • MEMBER
  • 3 POSTS
I replace the thermostat and coolant level is good how do I know if it heart core
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Wednesday, December 9th, 2009 AT 8:51 PM
Tiny
RASMATAZ
  • MECHANIC
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Both hoses should be equally hot -not warm on one and hot on the other.
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Wednesday, December 9th, 2009 AT 8:58 PM
Tiny
WISHMASTER27
  • MEMBER
  • 3 POSTS
Ok where do I find the heater core at on that car 1998 sunfire
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Wednesday, December 9th, 2009 AT 9:04 PM
Tiny
RASMATAZ
  • MECHANIC
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The heater core is where the heater hoses is connected to.
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Wednesday, December 9th, 2009 AT 10:23 PM

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