Question about 1998 Dodge Ram 2500 2WD

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No heat when set on ''High'' and ''Hot''

Since we got our truck November 2007, We have always had the problem in the winter time with the heat not getting hot. Mechanically speaking, the truck is fine. No over heating(I've had this issue in the past with a car of mine, and it affected the warmth in the car.), we have coolant, not water in the radiator, fans turn on when they should, the engine runs at an ideal temperature all the time. Just no warmth in the truck! Me, being a small female, I get chilled, and would rather take my clunker of a car, just so I stay warm! We'll have the fan speed on high, and the temperature knob all the way up, and the inside of the truck gets lukewarm.

I've suspected Heater Core, my dad suspects heater control valve, or thermostat... And I'm trying to keep my fiance from going to a repair shop on something that could be done, possibly, by myself! Please help!

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  • Stephanie W
    Stephanie W Dec 18, 2008

    Can you possibly translate that to layman's terms?

    Flushing the lines/system could possible solve this? How would somebody be able to tell if there was a possible blockage? or would that infrared gun be pretty much the only way?


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Circulation of hot hot water to inside cabin to heater core ..and fan blowing strong are all necessary here.....back flush system.. (good cooling system service) including flushing teh heater lines with all heater lines open ...refill and test... or to be sure replace thermostat and any suspect heater hoses at same time....a good shop with infrared gun can trace heat and locate blockage if necessary... good luck

Posted on Dec 18, 2008

  • milespeed Dec 18, 2008

    welll..ok...let me slow down here for ya ..was busy with other issues.... drain radiator..then, disconnecting the lower radiator hose and radiator cap...put hose in lower radiator and flush til clear through radiator overflow /cap area...close cap and do again..this time with upper hose off so the water from bottom flows clear out upper radiator hose you disconnected..all the while have your heater valve open and all settings to high full heat..(engine off).... as this being a wet and messy job i suggested you change out thermostat too an flush in there..change out or take off hose at heater valve and flush through there as well......advise me if i am confusing or can help more ... good luck

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