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Heater in 02 dodge ram 1500 blowing cold air - Cars & Trucks

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Could be a number of things. Easiest, check your coolant level. Next run the vehicle for a while, compare the upper and lower radiator hoses for temp difference, by touch, also check the smaller houses entering the fire wall. Have you changed the t stat?

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

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SOURCE: my heater is blowing cold air 2005 dodge grand caravan

In this order check the following:
Antifreeze level
thermostat
blend door
blend door motor...accordianman

Posted on Dec 16, 2008

RudolfDiesel
  • 100 Answers

SOURCE: The heater is blowing cold but the engine temperature reads high

Hi
I would first check to see if both heater hoses are hot to the heater.
if 1 is hot and 1 is cold the heater control valve is closed or the heater core is plugged.

Posted on Jan 14, 2009

  • 277 Answers

SOURCE: 02 Jaguar S Type - Heater blowing cold air

Has the vehicle overheated recently, if not there is a failure of the Coolant from engine valve controller, that measures flow through the Heater Matrix. Come back with more, as necessary.
Regards,DT

Posted on Aug 29, 2009

  • 1 Answer

SOURCE: I have a 2001 1500 dodge ram it has no heat

are heater inlet outlet mix valves standard for all dodge heater cores. I have 2001 dodge cummings blows warm air not hot when gauge is 195 degrees would there be a mix valve under the dash because it is not inline outside the wall

Posted on Nov 19, 2009

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SOURCE: 2001 Dodge Caravan heater blows cold air when stopped

Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.

Posted on Dec 05, 2009

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Heater not blowing hot air


When the fan motor is loud it means its out of balance. Kind of like a dishwasher.

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A heater motor isn't hard to remove. Usually above your feet on the passenger side held in with 3 or 4 screws and one heavy wire.

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2002 Dodge Ram 1500 - The heater blows cold air when it sits at idle but blows warm air when it is being driven down the road. A/C does the opposite, doesn't blow cold air when diling, but I figured this...


the heater blowing cold at an Idle and warm while driving it,is usually low coolant in the radiator,remove the radiator cap when engine is cold,fill to the top,and fill overflow tank to full,if that doesn't take care of it,check the heater hoses at an idle and see if they are both the same temp,it might be a water pump not doing its job.

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1 Answer

The heater is blowing cold but the engine temperature reads high


Hi
I would first check to see if both heater hoses are hot to the heater.
if 1 is hot and 1 is cold the heater control valve is closed or the heater core is plugged.

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