2001 Mercury Grand Marquis Air Conditioning Problems. Our users can find data on mass market car models from most popular brands. Contacted dealer who was not willing to do anything.

Also please check out the statistics and reliability analysis of mercury grand marquis based on all problems reported for the grand marquis. My father's 2001 mercury grand marquis overheats on highway drives, but only seems to do so when the air conditioner is on. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue.