Question about 2001 Mercury Sable

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Thermostat 99 sable

Engine does not warm up, assuming its the thermostat, where is it?. Looked all over but can find no indications of where it might be located.

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  • yadayada
    yadayada May 11, 2010

    what engine

  • edward80 May 11, 2010

    what size motor is in your vehicle?



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Go to this web site and see if this does not help you. It's seems to be reliable. It's AutoZone's DIY site.
Hope this helps.

Posted on Jun 14, 2009


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2003 Pontiac sunfire engine won't get warm

I am assuming that you know this since the temp gauge is not reading at normal temperature. I say this because I have had people in the past tell me that the engine wasn't warming up only to find out that the real problem was the heater wasn't working. They are two completely different issues. That said, the primary reason that an engine won't come up to operating temp is that the thermostat is either
  1. Stuck wide open
  2. Not installed.

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My 1998 mercury sable gs makes a gurgling noise in

this is usually an indication that there is air in the system and or possibly the engine is overheating causing the coolant to boil. try changing the thermostat and have the system checked for a bad head gasket.

Sep 16, 2014 | 1998 Mercury Sable

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Xtra long warm-up time 1997 mercury sable gs

Could be a weak thermostat thats not closing when the engine is cold.

Jan 31, 2014 | 1997 Mercury Sable

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Ford taurus overheating problem

Check the thermostat, It may be frozen in the closed position. The thermostat should open up as the engine warm up, this helps the engine tp warm up quickly.
A thermostat that is stuck in the opened position will not allow the engine to reach operating temperature quickly.

Dec 26, 2011 | 2000 Ford Taurus

1 Answer

99 3500dodge 5.9L cummings, running very rough when cold, warmed up runs fine.


The engine temperature sensor is bad. If so, the ECU assumes the engine is warm and it leans out the mixture, but you need a richer mix when cold, so it will run lousy till it actually gets warm.Check your coolant temp sensor. It may be defective and telling the computer that the engine is already warm. The computer is supposed to add extra fuel when cold to "choke" the engine until it reaches operating temp. If the sensor is reading incorrectly the computer may think its warm and not add the extra fuel to keep it running smoothly. Also check the two ground wires connected right next to the thermostat housing for loose or corroded connections. A bad ground here can also lead to running problems. If the sensors test ok have the timing checked.

Pull your diagnostic codes. The codes will tell if the sensor is not right.

Please get back to us if you have further query or else please accept this "particular" solution.

Thanks for contacting

Sep 19, 2011 | 1999 Dodge Ram 2500 4WD

1 Answer

99 sable 3.0ll Heater omly blows cold air.. radiator and heater core and thermostat replaced.,system flushed.

Here are a couple of things I would try.

Make sure your coolant level is at the full mark in the reservior, ( plastic tank)

Start your engine and let it run 6 to 8 minutes, so it reaches it's operating temperature.
With the engine still running, turn your heater on full blast. You should hear a light clicking noise from the thermostat opening up to cycle the coolant from the radiator. ( sometimes if a sealant is used, and it shouldn't be in most cases, when installing a thermostat excess sealant can prevent the thermostat from operating properly )
If you hear the click from the thermostat then you know that's working. then.......;

Turn the engine off, look back behind the engine at the firewall you should see 2 small hoses, about 1 inch in diameter. While the engine is still hot, carefully reach back and feel both hoses, both should be hot. If only 1 is hot then the coolant isn't circulation through the heater core and you could have blockage in your system.

Another good possibility is, the trap door that moves between the heater core duct, and the a/c evaporator duct is not moving back and forth like it should. To check this you will need to remove a few parts from the lower dash to gain access to inspect.

I hope this helps you.

Jan 26, 2011 | 1999 Mercury Sable

1 Answer

After 5 min or so AC blows warm and musty then blowscold after another 5-10 min Then repeats the cycle This is a2001 sable w/ 24 valve engine. An online mercury mechanic said it was moisture in the...


Its your thermostat control which keeps switching between hot and cold.

It maybe the climate control unit.

Check these and get them tested.

Hope this helps


Jun 14, 2010 | 2001 Mercury Sable

1 Answer

Temperature Gauge Stays Cold on 2005 Sable

look on the intake it should be there

Jan 14, 2009 | 2003 Mercury Sable

1 Answer

2003 sable heater not working

Warm up vehicle. Then, from the engine compartment, grip each heater hose to check if they are HOT. Not warm HOT. If they are both hot, then the BLEND DOOR is stuck to the cold position. Access this thru glove box area.

If they are not HOT, then check radiator hoses for proper heat. If radiator hoses are not HOT then thermostat is stuck OPEN.

If they are HOT then there may be a restriction in circulation to the heater hoses and heater core.

Dec 15, 2008 | 2003 Mercury Sable

1 Answer

1994 mercury sable has no heat

Yes, your sable has a thermostat, and it sounds like it needs to be replaced. Are u sure the temp gauge is broken? It may be that the thermostat is stuck open, which won't allow the engine to warm up, which in turn would show low engine temp. and result in no heat. Even the gas fumes could possibly be a result of the car running inefficiently due to running below operating temperature. So, replace the thermostat, and u may solve all your problems.

Dec 09, 2008 | 1994 Mercury Sable

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