Question about Mercury Grand Marquis

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Code 024 & 025 on 2003 mercury EATC

When Ac or heater either one is on it throws hot air only

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

pkthoege
  • 93 Answers

SOURCE: 2002 mercury sable heater wont get hot

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

Posted on Dec 02, 2008

  • 3600 Answers

SOURCE: 2003 hvac blowas hot air and compressor wont come

you havea broken cable to the vent blend motor or a bad vachum motor.

Posted on Jun 22, 2009

  • 234 Answers

SOURCE: 024 and 025 came up upon doing diagnostic check,on

Those look to be blend door codes you could try resetting them, does the heater make a clicking sound? If that is so the blend door actuator is bad and needs replacing.

Posted on Nov 10, 2009

  • 770 Answers

SOURCE: mercury 2003 gand marquis heater

One of 2 things could be happening. #1, the valve that allows coolant to circulate thru the heater core is not functioning. #2 the door that is actuated to allow cabin air to circulate around the heater core is not functioning properly. Possible causes, linkage to the valve, or actuator not working. Also a broken valve to the heater core. A vacuum leak, or faulty actuator would cause the door not to function. You can narrow down the problem somewhat by making sure that both heater hoses have hot coolant in them. You can do this by simply feeling the hoses. If they are both circulating hot coolant, then the problem is the misdirection of air flow. To repair this, the cause will have to be diagnosed, could be anything from your dash mounted controls to an issue with vacuum or the ductwork or the door or actuator. If not in the controls, the dash may have to come out. Good Luck, I hope this is helpful!

Posted on Nov 18, 2009

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ginko
  • 19396 Answers

SOURCE: 2003 mercury grand marquis LS

The blend door is stuck in cold position. That usually happens because the blend door actuator has failed.

You will need to test and replace the blend door actuator.

To replace the actuator you will need to take apart the dash and remove completely the instrument panel,d isconnect the connector, remove the four screws, remove the temperature blend door actuator and replace it.

The replacement is not a job for beginners, since you have to take apart the dash to access the actuator.

Regards.


Posted on Nov 18, 2009

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bert

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