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Replaced water pump. No heat in 92 lumina. No puddles of liquid, but runs hot blows out cool air but when set on heat nothing really comes out. Allot of smoke comes out heavy from by the passenger side a sweet smoke smell, even when just trying to start car. Checked thermostat but it only blows out steam no water. After driving for awhile the smoke will enter the cars cabinet. Just brought car what could be the problem

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Lumina's have a tendency to get an airlock when the cooling system has been drained. The best way to prevent this is to use a vac and fill system. but if you don't have one there are other ways. fill the cooling system as full as it will go and loose the top heater hose. Slightly remove it from the heater core as to let out the air but not too much antifreeze. Run the engine and keep toping up the level as it goes down and this should bleed the system of air. The highest point of the cooling system is the heater core and it drain first when your coolant is low, that's why you have no heat. Also the thermostat will not open to let the coolant flow through until there is coolant there. This is why you have steam not coolant. If all this fails you may have a head gasket leaking and that's another issue all together. hope this helps.

Posted on Nov 26, 2013

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You said it runs hot, if that is the temperature of the car (engine) it could be a thermostat, $12.00 fix and usually pretty easy to get to. Located on the front of the motor, usually above or behind the belts on the front of the engine. No heat from your heater could be the heater core, usually located under the dash of the car. Depending on the location of the heater core it may or may not be an easy fix, it did happened to me once, and mine was under the passenger side of the dash and was easy to reach. You can go to Auto-zone, type in the make and year of your car and the part you are looking for and you should be able to get a diagram of the part showing the location. Hope that helps.

Posted on Nov 26, 2013

  • reg rim Nov 26, 2013

    I will just try changing the thermostat first. puddles I'of anything in the car, low coolant light comes on first then temp light. Blows out sweet smoke smell from exhaust and under the hood sometimes at same time. took cap off thermostat and it was steam coming out not liquid which i was told was to come out. a a little more info. Thanks for all the he help guys

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It sounds like you are leaking antifreeze. The heater core is probably clogged up and leaking. Is the carpet wet somewhere under the dash? Not sure where the heater core is on your vehicle (probably passenger side) , but it will be wet on the carpet underneath the heater core if the core is leaking.

Posted on Nov 26, 2013

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The blend door(s) is (or are) not functioning correctly.

Here are instructions on how to remove and replace the various blend door actuators:



Re-Circulation Blend Door Actuator


  1. Remove the glove compartment.
  2. Remove the recirculation blend door actuator retaining bolts.
  3. Disconnect the recirculation blend door actuator electrical connector.
  4. Remove the recirculation blend door actuator and disconnect the control rod.
  5. To install, reverse removal procedure.


Instrument Panel Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Remove the glove compartment.
  3. Disconnect the electrical connector.
  4. Disconnect the instrument panel blend door actuator remote linkage.
  5. Remove the instrument panel blend door actuator retaining bolts.
  6. Remove the instrument panel blend door actuator.
  7. To install, reverse removal procedure.


Defrost Vent/Register Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Remove the instrument panel.
  3. Disconnect the electrical connector. Remove the defrost vent/register blend door actuator.
  4. To install, reverse removal procedure.


Footwell Vent/Duct Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Reposition the in-vehicle temperature sensor venturi pipe.
  3. Disconnect the electrical connector.
  4. Remove the retaining bolts.
  5. Remove the footwell vent/duct blend door actuator.
  6. To install, reverse removal procedure.


Cold Air Bypass Blend Door Actuator


  1. Disconnect the negative battery cable.
  2. Remove the driver side instrument panel lower trim panel.
  3. Disconnect the cold air bypass blend door actuator electrical connector.
  4. Remove the cold air bypass blend door actuator retaining bolts.
  5. Remove cold air bypass blend door actuator.
  6. To install, reverse removal procedure.

Posted on Oct 23, 2010

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