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2003 Grand Marquis Manual Climate Control Problem

Tiny
WENZO1
  • MEMBER
  • 2003 MERCURY MARQUIS
  • 150,000 MILES
Hi,
I have a 2003 Grand Marquis with manual climate control. The temperature control switch (middle switch) is not working and seems to be in the A/C mode. When I turn it to the heat mode I still get cold air. How do I attack this culprit?
All responses greatly appreciated.
Thank you,
Jan
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Sunday, February 21st, 2016 AT 11:37 AM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
The heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
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Sunday, February 21st, 2016 AT 2:13 PM
Tiny
WENZO1
  • MEMBER
  • 2 POSTS
Hi,

Interesting! I do not hear the door moving as I did before so I think you're right on.
Now with my model, Mercury Grand Marquis, how to I began to attack the repair. Is the actuator inside under the dash board? Any videos on my model auto?

Thank you very much.

JAN
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Sunday, February 21st, 2016 AT 3:58 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
This may not be a job for you. It is located on the top of the HVAC housing and requires removing the dash to access it.
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Sunday, February 21st, 2016 AT 4:03 PM

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