I have heat only when fan is on low and i changed the acuator for flap and still no heat.it dont leak or over heat.

Asked by Nov 28, 2015 at 07:52 PM about the 2004 Pontiac Grand Prix GT1

Question type: Maintenance & Repair

1 Answer


The heater core is always "on," in that there is always engine coolant flowing through it just like your radiator. If you have heat at low, you should have heat at every other setting. The temperature blend door directs incoming air to either pass over the heater core or to pass over the AC coil. I would check that the temp blend door is indeed functioning, and that the heater core is indeed getting fully hot (in other words no restrictions, blockages)

Your Answer

Pontiac Grand Prix Experts

  • #1
  • #2
    Tom Demyan
  • #3
View All

Related Models For Sale

Used Chevrolet Impala
366 Great Deals out of 26,939 listings starting at $1,000
Used Pontiac Bonneville
336 listings starting at $995
Used Chevrolet Monte Carlo
970 listings starting at $3,786
Used Pontiac G6
22 Great Deals out of 2,853 listings starting at $699
Used Chevrolet Malibu
616 Great Deals out of 48,807 listings starting at $1,800
Used Pontiac Grand Am
741 listings
Used Pontiac GTO
6 Great Deals out of 378 listings starting at $7,500
Used Ford Mustang
274 Great Deals out of 38,355 listings starting at $1,995
Used Chrysler 300
287 Great Deals out of 19,279 listings starting at $1,999
Used Jeep Grand Cherokee
843 Great Deals out of 74,143 listings starting at $500
Used Nissan Maxima
217 Great Deals out of 17,895 listings starting at $1,995

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.