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2005 Dodge Caravan interior heat

Tiny
MIKEWOY
  • MEMBER
  • 2005 DODGE CARAVAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
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.
Wednesday, October 6th, 2010 AT 4:38 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Is the cooling system full of coolant?
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Thursday, October 7th, 2010 AT 7:18 AM
Tiny
MIKEWOY
  • MEMBER
  • 2 POSTS
Yes, the fluids are all topped off
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Thursday, October 7th, 2010 AT 8:34 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 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?
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Thursday, October 7th, 2010 AT 9:31 PM

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