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Working on a 2001 mercury grand marquis the ac temperature door is not working. could this be a bad head unit or just an electrical problem at the actuator?

I'm working on a 2001 Mercury Grand Marquis. The EATC works all door modes except for temperature, I replaced the temperature door actuator because it wasn't doing anything when the temperature setting were increased and decreased.

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Directional flap actuator /motor problem

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I have a 2001 mercury grand marquis ls. it overheats when im driving it but don't shows it on the temperature hand ..what is the problem ??


The temperature switch on the side of the upper radiator hose is not working. That is, if the engine is hot. Boiling over - need to check thermostat. Grab on to upper hose (should be hot) than with engine off, grab bottom radiator hose. It also should be same temperature as top. If so, thermostat ok. Electric radiator fan - turn Ac on. Fans should run. No, check fuses & relay. Mechanical fan - with engine off, the blade should be stiff to turn. Easy, replace fan clutch. Usually, low level of water is most common. Wish you well.

Apr 18, 2017 | 2001 Mercury Grand Marquis

1 Answer

How to solve code p1299 on 2001 the grand marquis


Cylinder Head Temperature Sensor Detected Engine Overheating Condition http://www.autocodes.com/p1299_mercury.html

Dec 05, 2016 | 2001 Mercury Grand Marquis

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Ac only works for heat


Perform a self test on heater control head if it's electronic,... push floor and off button at the same time with key on, release, then press the auto button one time. This puts control head into self test. If you hear a clicking noise from your glove box area, probably a bad temperature blend door, also it will show a code on control head screen.post code here or Google it. Hope that helps. . Please rate if it helps you.

Apr 15, 2014 | 1998 Mercury Grand Marquis

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2000 Grand Marquis .Heater continues to heat .after temperature is reached.


Run self test on heater control head if electric temp control. .key on, press off and floor buttons at the same time for 2seconds then release and press auto button for a second, ck what codes show on heater control head. Then Google the code. .probably the blend door actuator

Mar 06, 2014 | 2000 Mercury Grand Marquis

1 Answer

Mercury Grand Marquis drivers door lock mechanism


Go to your local library. They have programs on their systems that will tell
you everything you ever wanted to know. These things are relatively easy to fix.

Mar 17, 2012 | 2002 Mercury Grand Marquis

2 Answers

Where is the blend door located onn a 2002 Mercury Grand Marquis


A blend door is located within the air distribution housing, under the dash. This area is very delicate to work on and it is easy to destroy non replaceable parts. I suggest that a qualified shop do this job for you...

Look for worn, damaged, or loose vacume hoses..

Feb 22, 2011 | 2002 Mercury Grand Marquis

1 Answer

Aac doesnt blow air


First check you fuses you should have at least two fuses,2nd if that dont work take a wire and run it straight from the battery to the ac switch if it starts to blow the electric part of the switch has gone bad.If that don't work you might hjave a bad ac unit.

Jul 19, 2009 | 1998 Mercury Grand Marquis

1 Answer

Climate control codes


I have checked every site that I can think of and run the question many times, unable to get the procedure, maybe a nice tech at the local dealer will help u out, if not I guess buying a service manual might be your only option. I am a retired Ford mechanic, I did almost all the AC work, I never found this problem was a control head issue, it was always the blend door electric motor, I think you can see it from the glove box if you remove the liner.

Sep 09, 2008 | 2003 Mercury Grand Marquis

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