Question about 2006 Mercury Grand Marquis
Heater will not blow hot air
Posted by Anonymous on
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Posted on Jan 02, 2017
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.
Posted on Nov 18, 2009
probably has a bad belend air door motor, to run the systen completely through its self diagnosis process" if has electronic auto temp control"
press."off "and "floor" at the same time release... then hit the "auto" button
wait til gives you code...... it will then "SOMETIMES start WORK normal til moved again by you.....
if manual, change hot to cold, listen carefully for clicking ...if clicking rplave blend door motor and inspect the plenums door while motor out
Posted on Jan 20, 2010
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