Question about 2004 Mercury Mountaineer

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2008 murcury mountaineer heater blows hot while in motion, cold when just sitting

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  • 51 Answers

Replace thermostat.

Posted on Oct 22, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

justuscc
  • 360 Answers

SOURCE: 97 murcury mountaineer blows #10 fuse

check for a short by the starter exhaust melts these wires together good luck

Posted on Sep 20, 2008

emissionwiz
  • 75807 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

onyeredson
  • 404 Answers

SOURCE: heater only blows cold air but hoses are hot

Hi!
It appears we have an Air lock scenario and you will need to perform a system Bleed.
Park the vehicle on level ground, when cold remove coolant filler cap, start engine and leave to idle, turn heater on full and blower to max. When engine reaches operating temperature watch and listen near coolant filler, keep clear as gurgling and hopefully a boil over should occur. Top up with very warm coolant and wait as it may do it again.
Check for heat inside vehicle if warm replace coolant cap but keep an eye on temperature gauge as the ~Air lock may have moved on from heater matrix/core so proceedure needs to be carried out again from COLD.
If persistent boil ups/over attention must made in the cylinder head
or gasket area, or possibly water pump?
Please press the Blue button to appraise my FREE Efforts, Thank You!
Paul 'W' U.K

Posted on Mar 01, 2009

warlock61
  • 659 Answers

SOURCE: Heater temp on mercury '98 mountaineer only blows hot

could be the blend door motor or the door could be broken these are common

Posted on May 09, 2009

  • 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

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

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97 murcury mountaineer blows #10 fuse


check for a short by the starter exhaust melts these wires together good luck

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