Question about 2005 Mercury Mountaineer

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The heater on my 2005 mercury mountaineer blows, but won't heat up

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  • 462 Answers

Switch or actuators that change from hot to cold not working

Posted on Jan 17, 2015

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6ya6ya
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Posted on Jan 02, 2017

emissionwiz
  • 75797 Answers

SOURCE: heating and cooling

You can't even reach the door without pulling the dash assembly out, then u might as well fix the problem,

Posted on Nov 11, 2008

  • 5495 Answers

SOURCE: 2005 Mercury Mountaineer rear end whine, how hard to fix

Before you do this you might want to try fresh gear lube. On Ford products they use a synthetic additive in the rear and not in the front 4x4 axle.
The next thing would be to determine if it is a wheel bearing or a pinion bearing. You have to pull the axles and eliminate them as the problem. You might get lucky and not need to do the pinion.
The technical part of shimming the pinion gears with replacing the pinion bearing is about the worst part of the job. You won't know about the gears until you see them. You will need extra shims on hand.
It is a moderate job for two people. If you have all the parts it can be done in a day.

Posted on Aug 23, 2009

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  • 1374 Answers

SOURCE: 1999 Mercury Mountaineer, heater/AC fan no longer blowing

I would check the fan first disconnect the electrical connectors on it and use a pair of home made jumper cables and run it from the battery. If it works move unto relay if it doesn't you've found the culprit.
Next check relay in the fuse box. Coolant tempertant switch(CTS) aka thermal switch and its circuit. CTS is usually located in the water jacket by the t-stat.

Posted on Apr 05, 2010

ftw1952
  • 10319 Answers

SOURCE: 2004 mercury mountaineer.heat problem When turning

Most likely the blend door actuator has a stripped gear on it causing the noise you hear. Since it runs repeatedly the stop on the gear has sheared off making it run like this

Posted on Sep 26, 2010

  • 4793 Answers

SOURCE: My 1999 Mercury Mountaineer has

try venting the topmost heater hose(when engine hot) to clear any trapped air,might work.....

Posted on Nov 04, 2010

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1 Answer

2006 mercury mountaineer when heat is on it blow hot on driver side and cold on passenger side.


There are dual blend doors in the heater blower unit, one for the passenger side is not working. Could be loose, jammed or broken.

Feb 05, 2017 | 2006 Mercury Mountaineer

1 Answer

2005 mercury mountaineer heater not working


take to dealer could just be the heat switch

Feb 10, 2014 | 2005 Mercury Mountaineer

1 Answer

The heater on my 2004 mercury mountaineer does not work. When turning the dial from ac to heat, cold air blows out while a sound like a door opening and shutting is heard.


there is a vacuum ran valve on your heater hoses goin in to your heater core on the fire wall, they tend to get stuck shut n dont open to let hot anti freeze in the heater core, so cold air right, qwik fix is find the valve on heater core inlet and wire tie it open so antifreeze circulates no matter what, this is known on ford explorers. pretty much same truck.

Dec 16, 2010 | 2004 Mercury Mountaineer

1 Answer

Not having any heat there is aclicking sound when i turn controls to heat


you have a A/C-Heat blend door actuator malfunction. This door switches from A/C vent to heater core vents via an actuator motor.Very Typical problem on Ford/Mercury/Lincolns vehicles. There are multiple actuators in this vehicle, some in the dash and some in the rear (only if equipped w/rear A/C-Heater. This will require pin pointing the exact fault, and may require lower dashboard or rear quarter panel interior trim (if rear A/C-Heater equipped) removal

Oct 24, 2010 | 2005 Mercury Mountaineer

1 Answer

2004 mercury mountaineer.heat problem When turning ac knob to heat clicking sound like door opening and closing repeatedly sounds and air blows cold instead of hot.


2004 mercury mountaineer.heat problem
When turning ac knob to heat clicking sound like door opening and closing repeatedly sounds and air blows cold instead of hot.

Sep 13, 2010 | 2004 Mercury Mountaineer

1 Answer

1999 Mercury Mountaineer, heater/AC fan no longer blowing


I would check the fan first disconnect the electrical connectors on it and use a pair of home made jumper cables and run it from the battery. If it works move unto relay if it doesn't you've found the culprit.
Next check relay in the fuse box. Coolant tempertant switch(CTS) aka thermal switch and its circuit. CTS is usually located in the water jacket by the t-stat.

Apr 05, 2010 | 1999 Mercury Mountaineer

1 Answer

Heater temp on mercury '98 mountaineer only blows hot


Everything that is heat and cooling in a vehicle is controlled by vacuum from the engine. It appears to me that your blend door vacuum line to the temp control switch is either off or cracked/broken and not making things work the way you want/expect. It's the vacuum friend.

Jul 01, 2017 | 1998 Mercury Mountaineer

3 Answers

Heating and cooling


You can't even reach the door without pulling the dash assembly out, then u might as well fix the problem,

Nov 06, 2008 | 1997 Mercury Mountaineer

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