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Posted on Dec 02, 2008
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2002 mercury sable heater wont get hot

I have a 2002 mercury sable and the heater want get hot. i have replaced the therostat,flushed radiatorand had the heater core blown out. all long as the blower fan isn't running you can feel hot air, but as sone as you turn the fan out it blows cool air. i have made sure the air condition isn't on. what esle can i do

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  • 5 more comments 
  • cookandcook Dec 02, 2008

    thank you very much i'll try this....cross your fingers

  • bikerider68 Jan 13, 2009

    i have an 02 sable gs with simaler problem i turn on fan and it blows hot for 15 sec or so then right to cold i have replaced water pump, thermo, and tried to reverse flush core

  • elco1984 Jan 25, 2009

    i have the same problem with my 2000 sable, i changed the thermosate,flushed the radiator and heater core. also checked the blend door and servo they are fine, what else could it be

  • Anonymous Mar 21, 2014

    cooling fan sensor

  • Anonymous Mar 22, 2014

    I replaced my radiator cap the thermostat and I know the cooling fan runs. It still gets hot. In fact its worse

  • Anonymous Mar 22, 2014

    Replaced thermostat, radiator cap, the cooling fan runs because I hardwired it.

  • Anonymous Mar 29, 2014

    i replaced water pumpand removed the thermostat completely from the system , i drained it and added a flush but im still having it over heat and some how the heater is still blowing hot air out with no thermostat

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3 Answers

Paul Thoegersen

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  • Posted on Dec 02, 2008
Paul Thoegersen
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You have a broken or stuck temp blend door in the heater case. or the servo motor is broken. this sits on top of the heater case

James Eskridge

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  • Posted on Jan 13, 2015
James Eskridge
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Pull glove compartment box out remove blend door actuator actuator and positioned or too hot side

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  • Posted on Jan 13, 2015
charles
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Check blend door operation

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Related Questions:

0helpful
1answer

2001 Mercury Sable 3.0 v6 heating problem had a flush done and changed the thermostat put new coolant in, replaced heater core, replaced blend door what else can it be
First make sure you dont have an air lock in your heater core and make sure you feel heat from the two heater hoses if you do fell heat your problem is under dash. If the hoses are not hot you have a blockage some where you may have a heater valve not operating it works by vaccum if u have AC look in the engine compartment or it maybe under the dash by heater core, I belive its in engine bay by Ac and heater boxes

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Oct 08, 2012 • 2001 Mercury Sable
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2002 Merc Sable wont blow air
I'd have to say it's the blower motor. Does it blow hot air when the heater is on?
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2002 Mercury Sable heater does not heat up. It throws out cool air. We've flushed out the core. Any suggestions?
There is a heater blend motor that is directly behind the dash panel, center, bottom, by the floor. It has four 5/16" screws, and a 6-pin wire connection in the center. It takes about 5 minutes to change it out and the part is $42, give or take a few dollars for taxes.

The blend door is what switches the air to hot or cold

Make sure coolant level is full.
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Jan 13, 2011 • 2002 Mercury Sable
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My sable is boiling over and losing coolant but is not overheating and my heater does not work. Heater core flushed out and has good flow. Has new thermostat and has been power flushed.
If it is a 3.8l engine, you have a blown headgasket, a very common problem on these cars.
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Feb 22, 2010 • 2002 Mercury Sable
0helpful
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I have a 2002 Mercury Sable 3.0. I noticed when
The clicking noise is the motor for the "blend door". The heater core and the air conditioning side share the same ducting. When you move the knob a small motor moves the door letting the respective hot or cool flow happen.
The heater core is probably blocked. The engineers at Ford have the coolant hoses bypassing the core with a WYE at the firewall. The coolant takes the path of least resistance and stops FLUSHING the heater core and it eventually clogs.
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Oct 12, 2009 • 2001 Mercury Sable
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2002 Mercury Sable, Heating Problem The problem I am having is I am getting almost no heat. It is not the blower motor, just had this replaced. Right after last winter it started blowing cold air, so I...
Hello. You are in luck. I just had this same issue in my shop this week. We changed the thermostat, and replaced the coolant. Fixed it right up. Since you did not mention a new thermostat, that would be my next move, if I were you.
Read full answer
Oct 09, 2009 • 2001 Mercury Sable
2helpful
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Car is running hot occasionally and the serpentine
Well there's only part that has to do with the cooling system and serp belt - the water pump!! Maybe it's starting to seize or has too much play. Either way, when you change the water pump, replace the thermostat and flush the system very thoroughly, those 98-99's are notorious for rust build up. Make sure to pull the heater hoses off and flush the heater core too. After all said is done, purge the coolant and make sure there is heat from the blower. If not you're going to have to replace the heater core because that gets clogged sometimes when flushing.
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Aug 07, 2009 • 1999 Mercury Sable
0helpful
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2002 mercury sable
The blend door that regulates the airflow over the heater core may be stuck in the AC position. It is inside the case and is most difficult to get to. There may be a YouTube video that may help you locate it and test it.
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Sep 14, 2017 • 2002 Mercury Sable
0helpful
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Running hot
replace the therostat ( most likely )

and the radiator cap
Read full answer
Nov 29, 2008 • 2002 Pontiac Aztek
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