2003 Mercury Mountaineer Heater not operable

L. Griffin · Posted at Tue Nov 03, 2009 6:24 pm

Heater problem
2003 Mercury Mountaineer 6 cyl Four Wheel Drive Automatic 105000 miles

When the heater is turned on, there is no heat blowing.

RickMar · Posted at Fri Nov 13, 2009 7:55 pm

You possibly have a "Blend Door Actuator" problem.

I hope I am wrong.... it is a pretty expensive repair, not the part you need but the labor !!

If it is the blend door actuator and you do not want to pay $1000.00+ for the repair ( I don't blame you at all) and you can do a little mechanical labor yourself there "is" a way to avoid all the dis-assembly which is involved by .....
(Cutting a hole in your heater core box) to gain access to the blend door.
That is what I sure would do, without a doubt.
If you want to know how to do it just let me know and I will get the information of cutting that hole right to you.
Good Luck;
Rick

RickMar · Posted at Sun Nov 15, 2009 3:48 pm

mdevlin · Posted at Thu Dec 17, 2009 6:13 am

My 2003 Mountaineer is doing the same thing. Since we just got the truck out of the repair shop (yesterday) for rebuilding the tranny I really don't want to pay the $1000+ to repair. Merry Christmas to me! Could you send me the instructions on cutting that hole? And will this hole cause any other problems?

mdevlin · Posted at Thu Dec 17, 2009 6:15 am

Found them on another thread.

RickMar · Posted at Thu Dec 17, 2009 7:31 am

Yep... the whole dash needs to be removed, $1000+ mainly for labor.
It has been going on for 10+ years and Ford/Lincoln/Mercury has not improved the design ....the S.O.B.'s
Here is the link for the quick fix if you want to do it yourself:
http://www.blenddoorfix.netfirms.com

There "is" another way and that is cutting a hole near the heater core and using duct tape to seal it back up after the repair is done. I will see if I can track that one down and post it here.

THE HOLE WILL NOT CAUSE ANY PROBLEMS AT ALL

Good Luck;
Rick