Question about 2008 Pontiac Grand Prix
When i turn the heat on it doesnt blow out hot
Posted by Anonymous on
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Posted on Jan 02, 2017
i have an Idea. first of all make sure that all of your vents are not plugged up. next check your heating coils to find out if only one side is hot or the other is only cold. i need more info
Posted on Jun 30, 2008
I don't want to over step my knowledge but you car is only 3 or 4 years old. I don't think your heater core is bad, unless it is leaking, Sounds like you have a blend door problem in the HVAC system. This door is actuated by a servo motor switching from hot side to cold side. This little servo can go bad and need replacing. Just make sure you don't have any bubbles in the coolant system first as long as you havent done any thing with the coolant system you souldn't have any air in the system Hope this helps you. Please rate my solution for you thank you
Posted on Jan 19, 2009
Have you checked the coolant level? If that checks out ok... With the engine fully warmed up touch the heater core hoses where they go into the fire wall (about the center of the firewall). They both should be pretty hot to the touch. You'll likely find one hot and one warm. If this is the case flushing the heater core will likely get your heat blowing out hot again.
Posted on Mar 07, 2010
attach both power and illumination wires to constant on car wires.... only way to have switched power is connecting the switched/ignition wire to a fuse
Posted on Apr 06, 2010
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