Question about 1999 Lincoln Navigator

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Heat not working in front it works in the rear the blower works but it blows cold air i was told that the vaulve needed to opened

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Low antifreeze can keep heating systems from heating correctly.

Check antifreeze level.

Posted on Feb 09, 2009

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2003 Pontiac Montana heat gets hot in front, blows but seems weak, and no heat on rear controls but blows ******* rear. what is going on?


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This is common you will need to check the front blower resistor, this is located under the dash on the passenger side on heater box next to blower motor. the wiring plug also needs to be looked at. the plug on some of these heats up and starts to burn and in turn the connector needs replacing and the resistor also.
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Shelly,

Buy used parts at car-part.com. Look on page with * to find the cheapest part. Coud be your temp blend door (#2) may not be moving back and forth. Or, you are not getting hot water to the rear heater core.

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You may have to crawl under the truck and feel the heater hoses to see if they are hot. You will find a group of 4 lines, 2 for heater and 2 for a/c. If hot, you know hot water is getting back to the heater core. If not, there may be a hot water vave that's not working. Not sure if EXP. has a water valve for rear.

Let us know what you you find. Good luck.

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