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heater does not heat

Discussion in 'Ram Trucks' started by thomasid, Nov 9, 2004.

  1. thomasid

    thomasid Junior Member
    Messages: 2

    Okay, here is one for you. The heater in my 99 Doge Dakota does not blow out warm air. The engine temp reads 195-200 and the heater fan is working. The outside air temp is around +10 and I have blocked the airflow to the radiator by 80%. I've also changed the thermostat and flushed the system. What might be wrong?
  2. streetsurfin'

    streetsurfin' Senior Member
    Messages: 770

    Somewhere in the heater hose going to your core you should have a valve , that is operated by your dash controls. It may be a vacuum controlled valve, I don't know the dakota's. It may not be opening to let the fluid circulate through the heater core. In some cases the core could be plugged, but this usually comes from lack of maintenance of the antifreeeze. You may be able to free up the valve once you find it. Someone else may have information specific to your model, but look for something along those hoses going through your firewall.
  3. topher4519

    topher4519 Junior Member
    Messages: 7

    I had the same problem about 2 weeks ago. All you need is 2 5/8 hose adapters female. Disconnect the one hose that goes to the Water pump, and the other that is connected to the engine next to the thermostat. Hookup the water hose to the hose that came from the water pump spray water for about 2 minute. Then reverse and spray the water the other way.
    You will end up with dirt and grim come out the other end. Hookup hoses and top off antifreeze. Start your truck and let it warm up.
  4. thomasid

    thomasid Junior Member
    Messages: 2

    heater does not work

    Thanks for the reply's . I'll check them both out and let you know the results.
    Thanks again