Question about 1999 Lincoln Navigator

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2002 Lincoln Navigator. Heater is not working, it blows cold air. I had the thermostat changed and it stills blows cold air. There is no water leaks under the dashboard. It takes about 10-15 min for engine to reach normal operating temperature.

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  • Anonymous Jan 29, 2009

    Heater is on but only blows cold air. What could be the problem?

  • Anonymous Feb 16, 2009

    i turn the heater on and only cold air comes out never hot air wait for a min to see if hot air comes out and nop nothing

  • Markbuilds Apr 11, 2009

    Heater blows only cold air, front and rear. Had thermostat replaced no change. no leaks. I did put some radiator leak stop in the system recently. Its hard to check anything since heater water comes from rear of engine, we all know what thats like to get to.

  • corazon1 May 25, 2009

    a 2002 lincoln navigator leaks from underneath, and its running and when its not running. but it leaks from about the middle part underneath

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Try changing the thermostat if thats not it check and see if you have water leaking in the passenger side floor board if so then you need a new heater core

Posted on Feb 24, 2009

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Set the climate control on FLOOR and set the temp on 90 degrees.set the front fan speed to MIN. Then, set the rear controls to MAX HEAT and MAX fan speed. If you have HOT air coming out of the vents, that means you have HOT water circulating through the heater cores and lines. This means that you are having a problem with the blend door in the FRONT climate system. This is a common problem with Navigator/ Expedition/ F150 trucks. Have the blend door replaced and you should be fine. Keep in mind replacing the blend door (because it is in the bottom of the dashboard) requires disassembly of the front dashboard. Check out WWW.heatertreater.net for an easier solution to access the blend door and a better replacement blend door.

Posted on Jan 22, 2012

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