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1968-2013 Full Size Vans Econolines. E150, E250, E350, E450 and E550

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Old 05-30-2011, 07:43 PM
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HOWTO install new blower motor - 1999 Ford E-250

I just finished installing a new heater blower motor. I've not done one before so this might not be the best way but it worked for me. This was done on my 1999 Ford E-250 van. I don't know how this translates to other years models.

I suspected that my blower had gone bad. Here's the electrical schematic that might help if you need to troubleshoot. Notice the blower motor resistor in the drawing.

Click the image to open in full size.

The blower motor is located in the engine compartment behind the battery. On the left side when facing the front of the van.
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Here's the view behind the battery. The blower motor is on the left. On the right you can see the plastic electrical connection into the blower motor resistor.
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Need to remove the battery. Disconnect the cables then look at the back of the battery.
There is a bolt to the battery hold down. 5/16" bolt head.
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How it looks removed.
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Lift out the battery.

You can get a better view of the blower motor and resistor.
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Next remove the battery tray. 1/2" bolt heads.
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The view without the battery tray. Now I know where the windshield washer fluid reservoir is located.
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The blower motor is attached to the blower assembly. Unplug the electrical connection to the blower motor
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There is a rubber hose called the blower motor housing tube. Disconnect the tube from the blower assembly.
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It's not required that you remove the blower motor resistor to replace the blower motor but I wanted to check mine. Here's the reason why. You can see debris among the resistance coils that has come off the trees and gotten into the vent system. I was getting some smoke within the cab while running the fan. This is the reason why. The coils where getting hot enough to cause this to smoke.
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The blower motor resistor looks corroded enough that it probably needs replacing.
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I'm not going to replace it at this time because I plan to make an upgrade to the blower system later in my RV build.

To the left of the blower motor is the A/C system suction accumulator/drier. This cylinder has to be moved a bit before the blower motor can be removed.
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There are three bolts that hold the cylinder in place. They are all on the left side and are 5/16" head.
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There are four screws that hold the motor blower in place. 5/16" head. Remove the screws and pop the blower motor from the blower assembly. Move the suction accumulator/drier a couple inches towards the front of the engine compartment and the blower motor with the attached wheel will just fit through.
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Here's all the pieces.
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Once I got the blower motor out I found that it wouldn't spin. "Well there's your problem!"

Went to the local Advance Auto and bought a replacement blower motor. $36.99. Part #35266 Limited Lifetime Replacement. And when the guy behind the counter asks "What kind of motor?" he doesn't mean 'blower".
Click the image to open in full size.

I'm going to reuse the blower motor wheel. It's held in place by this one retaining clip.
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I went to the Mcmaster-Carr web page for a more official sounding name for this type of a clip. They call it a "Self-Locking External Retaining Ring".

There is something about the previous photograph that I just can't put my finger on.

The retaining clip came off without much trouble. Just grabbed it with pliers and it pulled right off.
Notice the flat spot on motor shaft.
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To remove the wheel from the shaft I placed my hands on each side and gently worked it back and forth till it came free.
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Remove the blower motor housing tube from the old blower motor.
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I Cleaned it up and treat it with Armor All before reusing.
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continued ...
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Old 05-30-2011, 07:43 PM
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Install the blower motor housing tube on the new blower motor. Notice that the new blower motor has a external electrical socket. The old one had an internal socket.
Click the image to open in full size.

The old blower motor had a foam gasket where it mated to the blower assembly. It couldn't be reused so I had to come up with something. Since this was at the end of the day and I'd be finishing up the install in the morning I decide to make a gasket out of silicone.
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First clean off the metal surface so I'd get good adhesion.
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Put a layer of silicone on the metal face and use a putty knife to smooth it out and give it a somewhat even thickness.
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Let it set up overnight. Next day it's like a rubbery gasket.
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Use a utility knife to cut out the holes around the rim.
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The new blower motor came with a new retainer clip. Line up the wheel with the flat spot on the motor shaft and slide it on. To seat the clip I placed it on the end of the shaft.
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Then with the same 5/16" socket and extension I had used to remove the screws, place it on the clip and gently tap down with a small hammer.
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That's pretty much it. Just put everything back in the reverse order of it's removal.
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There are little nibs on the blower assembly to help with lining up the blower motor.
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One more hint. Hook up the battery and try out the new fan before you screw the battery hold down into place. I had a hell of a time getting that long bolt to seat correctly into it's base. Hate to find out there was a problem and I'd just have to take it out again.
Click the image to open in full size.

That's it. All additions and corrections welcomed.
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Old 06-07-2011, 02:14 PM
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WOW, that is an excellent write up. Thanks for the help.
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Old 06-07-2011, 02:25 PM
Tailgate77478 Tailgate77478 is offline
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Click the image to open in full size.
There is something about the previous photograph that I just can't put my finger on.


All joking aside, you deserve some REPS for this post!!!
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Old 08-15-2011, 02:04 PM
rustypierce rustypierce is offline
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Fantastic post! My blower only works on high and second to high. I need to replace the resistor in my 2002 e350 extended van. I hope it's in the same place.

I wonder who engineered that hamster wheel ??
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Old 01-29-2012, 05:08 PM
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Phew

Thanks for the post. I had read in the factory manual that removing the drier was necessary to replacing the blower motor. Nice to know that it can be wiggled out by shifting the drier. Didn't know if I was going to have to loosen/remove the plenum on the right or what to try and do it without opening up the A/C system. While in the salvage yard the other day I noticed that a few years behind my 99, the fan was in a different position and could be removed easier. It may have been that the later design the inner fender intruded more into the engine compartment vs the motor was moved to the outside, can't remember for sure. I was actually contemplating practicing in the junk yard to see if I could get it out without damaging the A/C. :-0

Usually the blower resister is the culprit and you have "missing speeds" as you clue. In my case I noticed the blower motor resister connector is rusted out and I'm going to try a new connector first, before replacing the blower motor.

Fortunately, my rig is a former club wagon so I have the rear fan still working. However, the A/C only works if you are moving. If no air is flowing over the front evaporater core, it freezes up and the compressor cycles off!
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Old 06-24-2012, 11:50 AM
Avenger Avenger is offline
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Excellent post. Thanks very much. Worked exactly as documented on my 2001 Ford E150 Van which needed the blower motor replaced. Thanks to your tips, I was able to do it myself (thought I'd have to take it in if the A/C cylinder had to be removed). My van has a 4.6L V-8.
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Old 06-24-2012, 02:44 PM
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My Dad had a blower motor on a '98 that developed a constant annoying chirp/squeak at low, default speed. To silence it he decided to turn HVAC system control off & got used to the vents being closed. At some point, after the blower had been off for awhile, when he needed fan, it no longer worked at all.

On a visit I had time to see if I could fix it for him. When I pulled the blower motor out I also immediately "found that it wouldn't spin". However, no replacement could be acquired until the next day & I was curious why it was stuck. Quickly discovered it didn't take much force to break it free, but found it was still stiff. So I removed 'squirrel cage' fan & oiled the bearing/porous bushing & in seconds had the fan spinning smoothly & silently. For good measure I opened back end of blower motor & oiled the other bearing. Put it back together & it was still fine years later when he sold it.

Small electric motors like this have very little start up power, so it doesn't take much to prevent spinning from rest. Once stuck, whatever caused them to seize tends to get worse. Have seen the same scenario w/power window motors. Oiling them is often worth a try.
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Old 11-17-2012, 06:34 PM
mlhebel mlhebel is offline
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Thanks for detailed pics and info.When my fan died I discovered several additional problems when I removed the fan motor, the harness connector to the resistor pack was corroded in the socket. Water leaking through the cowl seal allowed a puddle of water to build up in the bottom of the housing. The fan then blew the water around. For anyone running into this problem Dorman products makes a heater pack repair kit with a new pigtail harness which is about half the price of the OEM part. The Dorman PN is 973-404. Made that part of the repair easy, fixing the water leak not so easy.
Hope this is some additional help to a really good thread.
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Old 01-21-2013, 11:46 PM
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great description!

thanks so much for a great play by play - I may just go after mine, after driving for a year with no heat....
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Old 01-22-2013, 05:50 AM
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Reps most definitely sent---this was indeed a great write up WVVan!

I would add from my own experience with the battery hold down clamp/bolt and tray; occasionally any of those bolts can break during removal. Sadly there's no easy way to use penetrating fluids like PB Blaster before hand. Once they break time to drill and tap for new bolts. Been there, done that............

Part numbers:
Battery tray: 3C2Z-10732-AA
Bolts: N606688-S2
Hold Down: 6C2Z-10756-A


Hope this too is helpful to others.
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Old 09-21-2014, 03:14 PM
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Bringing up this old thread, I was wondering if it was possible to get to the vacuum check valve and canister with the blower motor removed? Where IS that darn thing?
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Old 09-21-2014, 03:31 PM
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Quote:
Originally Posted by Mach5 View Post
Bringing up this old thread, I was wondering if it was possible to get to the vacuum check valve and canister with the blower motor removed? Where IS that darn thing?
No you can not. Sorry pal.
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Old 09-21-2014, 03:31 PM
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Man, that write up is so real I think I got dirt under my nails just from reading it. Reps sent.
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Old 09-21-2014, 04:57 PM
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Thanks for all the kind words.
I read again through my instructions and see I forgot to mention that the silicone gasket must be made with Silicone II. Regular silicone isn't safe to use with metals. It will cause corrosion.
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Old 09-21-2014, 04:57 PM
 
 
 
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