6.5

fairly significant
Typical Repair Cost:
$752.00
Average Mileage:
118,478 miles
Total Complaints:
4 complaints

Most Common Solutions:

  1. re-engineer climate control (3 reports)
  2. replaced o-rings (1 reports)
2003 Mercury Grand Marquis AC / heater problems

AC / heater problem

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2003 Mercury Grand Marquis Owner Comments

problem #4

Mar 012014

Grand Marquis LS

  • Automatic transmission
  • 123,000 miles

A D V E R T I S E M E N T S

This has happened to everyone I know that had this car. AC/Heat just stopped and wouldn't work. The garage said they would have to pull out the whole dash to fix it!! Got it home and few months later the fan stopped blowing! I use to love this car for it handles nice and great to drive but the problem is costly and annoying!

- , Corryton, TN, USA

problem #3

Jan 072014

Grand Marquis LS 4.6L V8

  • Automatic transmission
  • 184,500 miles

The O-rings in the head unit dry out and blend door gets stuck on defrost. Pulled head unit and replaced all O-rings and reinstalled. Issue fixed without costly replacement of unit.

- , Ruther Glen, VA, USA

problem #2

Jan 072010

Grand Marquis LX V8

  • Automatic transmission
  • 110,000 miles

this problem has happened to EVERY mercury owner i know. we feel the company should do something. the climate control just quits working, making the car uncomfortable. its time to trade, i like my murcury but, i dont fee the company stands behinds its product.

- , Amory, MS, USA

problem #1

Jun 252007

Grand Marquis LSE 4.6L

  • Automatic transmission
  • 56,410 miles

THE ELECTRONIC CLIMATE CONTROL FAILED ON MY 2003 MERCURY GRAND MARQUIS AT 56, 410 MILES. IT LOOKS ALMOST IDENTICAL TO THE UNIT MY MOTHER HAD ON HER 1988 LINCOLN MARK V11. HER UNIT FAILED EARLY ON, JUST AS MINE DID. I FEEL FORD HAS TO DO A BETTER JOB ON THE DESIGN OF THESE UNITS. THEY HAVE HAD ENOUGH TIME TO LEARN FROM THEIR PRIOR FAILURES WITH THIS CONTROLLER, AND MAKE THE NECESSARY CORRECTIONS.

- , Agoura Hills, CA, US

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