Usually air flow issues on these cars is the blend door actuator. The blend door actuator moves the blend door to direct heat and a/c. The entire dash needs to be removed to replace the blend door correctly, but there are some short cuts posted on the web. Do a "google" search for mercury blend door actuator replacement and make sure your symptoms are caused by the blend door actuator. If you do replace the actuator make sure you only use a genuine Ford / Mercury part as some of the aftermarket actuators are inferior quality.
control unit has been replaced 5 times. then resistor is replaced ac will blow cold for 4 or 5 days then stop and only blow hot, any ideas? thanks
2003 Mercury Grand Marquis
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Maintenance & Repair
OLD PROBLEM: I had a suspected vacuum leak in my Grand Marquis as when I accelerate the AC would cut out. Idling is a little uneven and sometimes will accelerate faster than it should. I found a vac...
1989 Mercury Grand Marquis GS Sedan RWD
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Maintenance & Repair
My grand marquis ac was working fine and a few nights ago I turned it on and it stopped blowing air, and wont do anything, I'm trying to figure out what's wrong! Thanks in advance!!!
2004 Mercury Grand Marquis
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Maintenance & Repair
AC runs good then seems to overload and shutdown. The only reset is to remove battery to reset. What should I be looking at and what am I resetting?
2000 Mercury Grand Marquis LS
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Maintenance & Repair
Where is the air control valve located 05 grand marquis
2005 Mercury Grand Marquis GS
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Maintenance & Repair
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