Question about 2003 Mercury Grand Marquis
When I want to turn my heater or aircondioner it wont work , I can hear that it want to go on but it doesnt . could this be a fuse problem ? I have a 2003 mercury grand marquis .
Your EATC control module is bad. 100% all Grand Marquis and Crown Victorias with electronic ac controls.
I rebuild them with lifetime warranty.
Email to email@example.com if interested.
Posted on Jul 25, 2009
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Posted on Jan 02, 2017
Either your heater control valve is not properly operating or your heater core is clogged. Locate the heater control valve under the hood, should be close to firewall on heater hose, have someone adjust temperature from hot to cold and see if you can see the heater control valve operating if so replace the heater core, if its not doing anything replace it(heater control valve).
Posted on Feb 19, 2011
they don't have diagram that i've seen, my roommate has this car and on page 172 of owners manual it gives the number of what fuse does what,, .. which corresponds to the number on the lid of your fuse panel
Posted on May 20, 2009
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
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