2000 Pontiac Grand Prix cold air

Tiny
GTP3800
  • MEMBER
  • 2000 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
My car is blowing cold air instead of hot air when I turn the heater on. What is the problem?
Tuesday, September 15th, 2009 AT 10:57 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Either thermostat or heater core.

With engine warm, quickly touch the two heater core hoses, if one is hot and the other is cool, then heater core is blocked.

If both are cool the thermostat is open.
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Saturday, September 19th, 2009 AT 7:40 AM

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