1988 mercury grand marquis, my A/C hi/low speed control is not working. It kn blows air when I have it in HIGH but if it gets to cold and I want to turn it down just one notch it'll turn off. Can anybody help me out with this problem?.If so, what part/s will I need to change?

Asked by Mar 26, 2013 at 09:25 PM about the 1988 Mercury Grand Marquis

Question type: Maintenance & Repair

6 Answers

82,995

Mercury had 2 systems in the Grand Marquis, the ATC system and the standard. What one do you have?

I have no idea :/

82,995

OK look at the temp control lever if it has numbers on the scale then it is an ATC unit, if it has only a scale that goes from blue to white to red then it is a standard.

82,995

If your system is standard there is a resistor block under the hood fairly close to the blower motor, it will be held in by 2 small screws and might be a faded red color if it hasn't been replaced before. It is available at most parts stores. If it is a ATC unit the fan is controlled by a small mode control unit kinda like a computer, if that needs work I would suggest taking it to someone you trust in an auto repair shop.

245

I second the blower motor resistor block, under the hood. The HI setting is the normal blower speed, so HI will always have juice. The resistor gives you MID and LO speeds. Its right behind the intake plenum, screwed on to the heater box. Its straight forward to replace but, its in a tight spot.

60

How do it look

Your Answer

Add photo

Related Questions

Grand Marquis

Looking for a Used Grand Marquis in your area?

CarGurus has 2,206 nationwide Grand Marquis listings starting at $1,995.

ZIP:

Search Mercury Grand Marquis Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,030
#2 kbro
kbro
Reputation 2,020
#3 Js08016
Js08016
Reputation 1,560
View All

Related Models For Sale

Used Lincoln Town Car
38 Great Deals out of 2,159 listings starting at $1,995
Used Ford Crown Victoria
4 Great Deals out of 1,477 listings starting at $2,900
Used Dodge Charger
469 Great Deals out of 29,730 listings starting at $2,275
Used Ford F-150
3,210 Great Deals out of 205,087 listings starting at $1,779
Used Toyota Camry
1,193 Great Deals out of 93,152 listings starting at $700
Used Cadillac DeVille
4 Great Deals out of 1,991 listings starting at $1,600
Used Buick LeSabre
8 Great Deals out of 2,329 listings starting at $1,768
Used Honda Accord
1,081 Great Deals out of 76,804 listings starting at $1,395
Used Chevrolet Caprice
179 listings starting at $9,950

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
42 listings starting at $5,900
2010 Mercury Grand Marquis For Sale
6 Great Deals out of 120 listings starting at $2,999
2009 Mercury Grand Marquis For Sale
5 Great Deals out of 117 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
8 Great Deals out of 176 listings starting at $2,995
2007 Mercury Grand Marquis For Sale
6 Great Deals out of 164 listings starting at $2,750