Question about 2001 Mercury Sable

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My heater on my 2001 mercury sable isn't working.. It will blow warm air for about 2 minutes and then goes cold again

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  • David Johnson
    David Johnson May 11, 2010

    I need more info to help you. Have you checked your thermostat?



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I had the same problem with my sable. You need a heater blend door. The one on your car is stuck and wore out. The replacement part costs about fifty-two dollars, labor will be more like about one hundred dollars if you take it to a dealership.good Luck

Posted on Dec 26, 2008

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It won't be the thermostat...or blend door...Sable and Taurus have a design problem. The heater core hose going into heater core from water pump gets plugged up right at the heater core bypass junction. At Hardware store..Buy hard plastic hose/tubing about 4ft long that just fits inside of the heater core hose. My ACE hardware has white hard tubing. Cut one end of the hard tubing at angle to use it as a reamer inside the heater core hose. Now place the hard tubing on top of heater hose to measure the distance on hard tubing it has to travel up to firewall . Mark with black marker on hard tubing. Remove the heater core hose from top of water pump and slide hard tubing in hose all the way up to where the bypass connection is feeling the obstruction...rotating the hard tubing as you gently shove it thru heater core hose. Slide it back and forth and keep rotating it until you feel it go past the Bypass junction...10 min at least. Now take off the heater hose from engine on driver side that comes from the heater exit side...Use garden hose high pressure and back flush the crud out. Re connect hoses, add fluid to reservoir as needed. Or take to shop and have them do this. Many shops just back flush...Have them do BOTH! Buy the plastic tubing ahead of time so they have no excuse. I have been doing this on my 98 Taurus since 1999. Done many of these...If you haven't changed thermostat for 4 years ...Change that as well. You tube has videos. Email me at I promise you hot air...from the car!

Posted on Jan 02, 2015


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