I have a 2001 :oops: sorry. 18 is good
I've been doing some research online and think it could be the blower speed controller
Question : What is wrong with my cars heat and air? I have a 2001 Mercury Grand Marquis?
It heats up and cools, but even on high, it just barely blows like it is set on low. I think it might be the blower motor. But not sure. If so, what does it take to fix it? Will it be very expensive? My brother said the whole dash will have to come out to get to it. Is that true? I would appreciate anyones input or suggestions since winter is almost here, and I am freezing when I first start my car. Thanks.
The blower motor is under the hood area on the right side, it has 3 bolts holding it in, and wiring on top of it. You could have a blower speed controller stuck, or switch that is bad, but the first thing to do is take the blower motor out and check the cage on it, and then look inside to make sure thatt there isn't anything restricting air as it blows thru the evaporator core, I have seen mice make nests in blower motors and in the case area. It should only take 30 minutes to remove the blower motor, and doesn't really need special tools, a 8mm or 5/16 socket, ratchet and a couple of extensions.
I have been searching the Forums on and fiddling around with the EATC System Blower Motor Controller circuit on our 2001 GM LS for a year trying to solve the (initially) intermittent operation of the Blower for a year. After running with the Blower hot-wired thru a toggle switch for six months (when the intermittent problem went to complete failure)I finally got around to pulling the Controller Board out of the Heater/AC box last week.
On my last search of the Forums I turned-up a note from a fellow who said "[i:3032717cf1]most guys just fix it with a little bit of solder[/i:3032717cf1]" this turned-on a lightbulb for me and today I had a look at the solder-joints where the connector is attached to the Controller Board. Sure enough, I could see that the solder was cracked at one of the big lugs of the connector!
I heated-up the pins at all 5 connector lugs and flowed a little solder into the "gaps" around the pins. When I plugged the Board into the harness I found I have a Blower that once again works under control of the EATC!
Now all I have to do is re-install the Board into the Heater/AC Box - a real tight squeeze. Right now I have it tie-wrapped to something under the hood but the heat sink on the Power Transistor gets REAL HOT - I think the best place in it is back inside that Heater/AC Box.
These are exact discriptions of what I have experienced. Where can I find the blower motor control?
Sunday, May 20th, 2007 AT 7:27 PM