Question about 1999 Dodge Durango

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Air only gets cool and the heat only gets warm

The air con. does not get cold and the heater only gets warm not hot

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  • vanwycar Jan 09, 2009

    I have the same problem. I have changed the thermostat and the intake manifold but no change. I do get heat out of the rear (back seat) heater but not up front. Any ideas?

  • swren517 Jan 11, 2009

    My durango gets warm but not enough to keep warm in the car. Someone told me (not an auto mechanic) to get a radiator flush. I still have yet to take it in to an auto shop.

  • kanlharris Jan 11, 2009

    I WAS TOLD THE INTAKE GASKET WAS LEAKING AND THAT TAKES AWAY FROM THE VACUUM TO THE LINES RUNNING TO YOUR HEATER WHICH CONTROLS THE BLEND DOOR. IT ALSO MAKES YOUR DURANGO USE OIL. YOUR TALKING ABOUT $300 TO $400 REPAIR

  • kanlharris Jan 15, 2009

    I HAD THE INTAKE GASKET REPLACED AS STATED ABOVE AND NOW THE HEATER IS PUTTING OUT HOT HOT AIR LIKE IT SHOULD . COSTLY, BUT IT DID THE JOB.

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Found this on another website from someone else with the same problem. Hope this helps.

"This is the second year for lukewarm air coming from heater. Last year I changed t-stat and add new coolant ,also new radiator cap. It helped a little but not enough. Took it to a mech. and had it flushed ,that seemed to help alot but not as hot as it used to be."

Posted on Jan 11, 2009

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2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is worm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest to flush the heater core.

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2) Start engine and check if engine reaches regular temperature. If your engine is not heated enough it means your thermostat does not work properly and should be replaced.
3) If engine temperature is normal, then check the temperature of pipes that go to/from heater core. These pipes are located up the fire wall (easier access is from the passenger side). If pipe/pipes are cold (even engine is warm) it means you heater core is plugged and should be flushed. Keep in mind, flushing the whole cooling system is different from flushing heater core.
4) If pipe/pipes are hot/warm, turn off the fan, switch controller to the hot position, wait for 3-4 minutes and turn on the fan. Note if the cold air blows first or warm air blows first but it cools down in 5-10 seconds. If the air blows cold than it is most probably the problem with blend door or blend door actuator.
5) If air blows warm first and then cools down, then while running engine and remaining the transmission in PARKING position, press on the gas pedal until your engine reaches 3,000 RPM. Check if your heater blows warm/hot air. If it does, then your water pump does not work properly and should be replaced. If the air still cold, I would suggest flushing the heater core.

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