Reply
 
Thread Tools Display Modes
 
Old 04-10-2018, 08:52 AM   #1
Senior Member
 
Join Date: May 2012
Location: Long Beach, Ca.
Posts: 149
A/C acting up

2002 Ford E350

Iím hoping to trouble shoot this before bringing it into the shop. My fan knob only kicks on when itís on high (low and two intermediate settings donít respond). Additionally, the selector knob isnít directing the air to the proper places (flow seems to be split between defrost, floor and dash vents).

Any input would be greatly appreciated. Otherwise, can anyone recommend a reputable auto A/C guy in or near Long Beach that can take a look?
__________________

DosMars is offline   Reply With Quote
Old 04-10-2018, 10:06 AM   #2
Junior Member
 
Join Date: Feb 2015
Posts: 2
geller

Have run into this at least a couple times. Sounds like you have a faulty blower motor RESISTOR. It is responsible for adjusting fan speed, for instance if set on low it will resist about 75% of current flow. (my thoughts)
I do not know where the resistor would be on your vehicle, but maybe find it on google or youtube or wiring diagram. It will still work on high and defrost as that is a safety feature. Good news, does not sound like an ac issue. I would suspect it works the same way on heat. Just my two cents w/o inspecting. Hoping for your success.
__________________

1993gellercamp is offline   Reply With Quote
Old 04-10-2018, 10:14 AM   #3
Senior Member
 
Join Date: May 2012
Location: Long Beach, Ca.
Posts: 149
Thanks Geller, those are exactly the type of encouraging words I was hopping to hear. I'll look into it, hopefully a quick fix.
DosMars is offline   Reply With Quote
Old 04-10-2018, 10:23 AM   #4
Senior Member
 
Join Date: May 2012
Location: Long Beach, Ca.
Posts: 149
Looks pretty straight forward. Less than $20 part from Autozone and I even found a video on where it's located. I'll give it a shot and let you know how it goes.

DosMars is offline   Reply With Quote
Old 04-10-2018, 11:01 AM   #5
Senior Member
 
arctictraveller's Avatar
 
Join Date: Mar 2013
Posts: 2,177
You likely have two different issues. Air flow is directed by the use of vacuum, and if you have a vacuum leak, you get air out of vents that are not selected. This has been discussed a lot here, so try the search function. To start, check this thread

http://www.sportsmobileforum.com/for...nts-17921.html
__________________
Arctic Traveller
KC6TNI
2001 GTRV
Advanced 4wd
Agile Ride improvement package
www.arctictraveller.com
arctictraveller is offline   Reply With Quote
Old 04-10-2018, 11:46 AM   #6
Senior Member
 
Join Date: May 2012
Location: Long Beach, Ca.
Posts: 149
Quote:
Originally Posted by arctictraveller View Post
You likely have two different issues. Air flow is directed by the use of vacuum, and if you have a vacuum leak, you get air out of vents that are not selected. This has been discussed a lot here, so try the search function. To start, check this thread

http://www.sportsmobileforum.com/for...nts-17921.html

Thanks for the link, hopefully if I can get the air moving by replacing the BM Resistor and I'm still having trouble with the selector switch I'll be in go-mode to trouble-shoot a possible vacuum leak!
DosMars is offline   Reply With Quote
Old 04-10-2018, 11:50 AM   #7
Junior Member
 
Join Date: Feb 2015
Posts: 2

Compared to the guys on here I am a real amateur. But I thought this video was helpful and may be of use for the second problem. Finding vacuum leaks is such fun. This fellows solution was quite ingenious. Best to you. Geller
1993gellercamp is offline   Reply With Quote
Old 04-14-2018, 06:55 AM   #8
JWA
Senior Member
 
Join Date: Jan 2011
Location: Reynoldsburg, Ohio
Posts: 1,576
Send a message via Yahoo to JWA
If you've not already accomplished this swap strongly consider a new pigtail lead, the one from the wiring harness into the resistor itself. Too often those are nearly impossible to remove from the resistor housing without damage. Plus the age of your van (assuming the resistor/connector are original) makes these parts quite brittle, tend to fall apart in your hand.

Contacts might show a bit of carbon build-up from all the amps running through them over the years.

FWIW every time I've done this the battery comes out and the battery tray too---makes life much easier! If you do remove the battery tray be advised the bolts holding it to the body structure might be stubborn and cause more problems replacing them making than the extra room removal gives you not worth the hassle.

HTH
JWA is offline   Reply With Quote
Old 04-15-2018, 09:15 PM   #9
Senior Member
 
Join Date: May 2012
Location: Long Beach, Ca.
Posts: 149
Quote:
Originally Posted by JWA View Post
If you've not already accomplished this swap strongly consider a new pigtail lead, the one from the wiring harness into the resistor itself. Too often those are nearly impossible to remove from the resistor housing without damage. Plus the age of your van (assuming the resistor/connector are original) makes these parts quite brittle, tend to fall apart in your hand.

HTH
Yes, the resistor shorted out and melted to the original pigtail lead.
Completely brittle and disintegrated when trying to take them apart.
That actually made things much easier, as after labeling where each wire went in the old lead, all I had to do was connect them to their corresponding wire on the new lead and bolt it back into place. I saved myself some headache by inspecting the new resistor before sliding it into place. In monkeying around I had inadvertently bent one of the coils of the new resistor over and it was touching the adjacent coil. Easy enough to bend back into place before re-mounting it.
The pan and battery came out and went back in with no troubles.

At this point, the blower motor was working well, but I was still not getting air from the proper vents. I bought 8 feet of vacuum hose and bypassed/spliced from under the hood through the passenger door into the spot in the passenger wheel well indicated in the video above and everything worked fine. Instead of going through the bolt hole, I found a rubber plug at the side of the wheel-well about 18 inches up from the floor that you can see from outside by looking between the open door and door frame. I popped it out, drilled a hole through the center to accommodate my new vacuum tube and popped it back into place. Much cleaner and didn't have to remove the dog-house.

I also took advantage of my fix-it-fit to pull and rebuild the vent to the left of the steering wheel. The tabs that link the vertical and horizontal louvers had popped off. I found one and fabricated the missing one out of a zip tie. Now I have cold air blasting me from the left again!

Also looked up online how to re-program my key fob. Took 4-5 tries but now my doors lock and unlock at the push of a button again.

All in all a very productive weekend. Thanks to all for pointing me in the right direction. Not too difficult and saved me a bunch of money. One of the videos I ran across showed what the dealer goes through to get to that vacuum leak. 6.5 hours of labor and a lot of stuff sitting on the shop floor that had to come out just to get to it...

Edit: Sorry about the orientation of the photos, despite rotating them before uploading they seem to be coming through upside down on preview...
Attached Thumbnails
Vaccum reroute.jpg   vacuum pass-through.jpg  
DosMars is offline   Reply With Quote
Old 04-16-2018, 05:27 AM   #10
JWA
Senior Member
 
Join Date: Jan 2011
Location: Reynoldsburg, Ohio
Posts: 1,576
Send a message via Yahoo to JWA
Quote:
Originally Posted by DosMars View Post
One of the videos I ran across showed what the dealer goes through to get to that vacuum leak. 6.5 hours of labor and a lot of stuff sitting on the shop floor that had to come out just to get to it...
Got a link to that video? I'd love to see what's involved.

BTW glad you got all this sorted out---it can be aggravating and uncomfortable too---fixing it all so worth the time and effort!
__________________

JWA is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 02:33 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.