2005 Dodge Caravan interior heat

100,000 MILES • 6 CYL • 2WD • AUTOMATIC
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MIKEWOY
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  • 2 POSTS
The vehicle puts out real good heat while driving, but the heat changes to cold as the RPMs drop such as sitting at a stop light.
Oct 6, 2010 at 9:38 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
Is the cooling system full of coolant?
Oct 7, 2010 at 12:18 AM
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MIKEWOY
  • MEMBER
  • 2 POSTS
Yes, the fluids are all topped off
Oct 7, 2010 at 1:34 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,244 POSTS
It has one of a few things. Either the blend air door isn't working properly, the engine isn't fully warming up, the heater core is partially plugged, or (worst case) there is a head gasket problem. However, I would think you would notice a coolant loss, or air would be getting into the system.

If you start the engine, turn the heater on, and let the engine warm up, do both heater core hoses get hot at an idle or does one side get much hotter than the other?
Oct 7, 2010 at 2:31 PM
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