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2004 Pontiac Grand Prix Heater/defroster

Tiny
ARCTICMAN1982
  • MEMBER
  • 2004 PONTIAC GRAND PRIX
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
2004 Pontiac Grand Prix GT, When the dash vents are turned on, they will eventually blow heat, but it takes about 25-30 min. However when I turn the knob to defrost (after heat has started coming out) the air goes ice cold from the defroster vent and won't clear my windows. What do I need to fix? I have already replaced the thermostat.
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Tuesday, October 5th, 2010 AT 6:57 AM

1 Reply

Tiny
CRZYDRVR
  • MEMBER
  • 432 POSTS
Kinda sounds like the blend door actuator. This is a motor that moves the blend door ( controls from hot to cold in the heater box) you may want to have it taken into a reputable repair shop to have it properly diagnosed.
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Wednesday, October 6th, 2010 AT 10:45 PM

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