Question about 1999 Lincoln Navigator

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1999 Lincoln navigator. We changed the heater core. Put everything back together, won't start. We can get it to start if we jump directly to the starter. Radio is not working either. Can you please give me some guidance.

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Check all wiring in the area of the heater core you have left something disconnected.check all connections,grounds

Posted on Sep 26, 2009


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1 Answer

Procedure to replace a heater core on a 2001 Lincoln town car

Discharge AC. Drain cooling system. Disconnect AC and heater hoses. Rip out dash. Rip out heater box. Swap in new heater core. Reverse to put back together.

Sep 18, 2017 | Lincoln Cars & Trucks

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Changed the heater core, took the dash apart to replace the core, put everything back together and it will not start

Something not plugged back in or loose connection? Heater core replacements are time consuming and a lot of electrical has to be disconnected to perform the procedure

Dec 06, 2015 | Cars & Trucks

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99 Navigator-Radio and heater continue to run with ignition in OFF position. Ignition switch has been changed.

Stuck ignition relay possible. With hot battery, turn key off and then feel each relay. If you find a hot one, change it.

Jan 15, 2015 | 1999 Lincoln Navigator

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1999 lincoln navigator turns over won't start dash board lights stay on with key out.

sounds like antitheft system is acting up..needs reprogramed maybe..pull the negative cable with the key on....kills everything..then shut the key off..reconnect the negative.. turn the key to run position for a few seconds(resets all factory presets) see if it will start..

Feb 10, 2013 | 1999 Lincoln Navigator

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No heat in car jus cold air

Here's a good starting point. I know that rangers and explorers from the same era used the vacuum operated heater core valve described in the following post, so your Navigator likely will be similar. Your heater core valve will probably be located on the passenger side of the engine near the firewall.

Dec 24, 2010 | 1999 Lincoln Navigator

1 Answer

1999 Lincoln Navigator stops blowing hot air

Since your blower is working and it is a heat issue,thats where we'll start,First thing is have you checked the coolant level in the radiator when engine is cold,make sure it is filled to top,next verify you have coolant in reserve ,Start your van and get it up to normal operation temperature,If your heat gauge on the dash works correctly it should be 190 degrees,Now lift the hood and locate the two heater hoses going into the heater assembly at the fire wall,Both hoses should be hot to hold on to,if both are hot and no heat inside your problem will be the blend air door in heater assembly.
if neither hose is that hot you need to replace the thermostat in the engine to get it up to 195 degrees.
if one hose is hot and one is luke warm then the heater core is blocked and to blame. hope this helps you.

Jan 01, 2010 | 1999 Lincoln Navigator

1 Answer

Smoke coming out of vents need to change my heater core but how?

Iv'e done just about everything anyone can do on a car (a few times more than once)..and, heater cores are not my favorite job! Good luck!!

May 07, 2009 | Lincoln Navigator Cars & Trucks

2 Answers

2000 Lincoln Navigator, How do you get the heater core out?

the door squeezes in on the side to open all the way to reviel the screws

Dec 24, 2008 | 2000 Lincoln Navigator

1 Answer


U must remove the entire dash assembly and then the heater core housing which is part of the air distribution box, time to do the job 10-15 hours.

Nov 24, 2008 | 2003 Lincoln Navigator

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