Question about 2004 Dodge Ram 1500

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No heat 2003 Dodge Ram 1500 4-door pickup with a 4.7 liter magnum. I have replaced the thermostat, water pump, heater core, and flushed the radiator and replaced with new fluid, then bled out all bubbles. Still no heat.

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  • cheechmeron Jan 22, 2009

    Original problem was overheating. Radiator was clogged solid so I replaced it and the thermostat (proper side up). Vehicle ran good. Winter came, had no heat. Checked heater core, it was also clogged solid, so I replaced that as well. Still no heat. Driver side is ice cold, and passenger side is luke warm. Bled air out of cooling system as well. Also, A/C compressor is off.

  • cheechmeron Jan 22, 2009

    Had the whole dash off, the vents are operating properly.

  • cheechmeron Jan 22, 2009

    Thanks for all the help. The thermostat is in correctly. I covered the top half of the rediator with cardboard and I get heat on the lower fan speeds. That is good enough for me. Thanks again.

  • Roberta Smith
    Roberta Smith May 11, 2010

    the only other thing off hand is that the thermostat was put in backward.



    Robert

  • Roberta Smith
    Roberta Smith May 11, 2010

    interesting that you have a small amount of heat on one side.... are you sure the vents are even opening ?





    Robert

  • Roberta Smith
    Roberta Smith May 11, 2010

    when you replace the thermostat... did you place the proper end toward the motor... and you haven't mentioned it overheating.... is there heat coming out the top vent ?



    Robert

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You probably just need to backflush your heater core. You can use a hose to flush it back and then forward. You'll be surprised at how much sludge and gunk will come out.

Posted on Jan 21, 2009

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