Heater blower motor not working

XR4Ti / Sierra / Sierra Cosworth Discussions - Questions, problem resolution, general talk, technical tips and modifications.
Post Reply
Choochoochoo
Level 4
Level 4
Posts: 363
Joined: Sat Oct 31, 2015 11:40 pm

Heater blower motor not working

Post by Choochoochoo » Tue Nov 03, 2015 10:18 am

So I just bought an 85 xr4ti knowing that it has a few minor issues. One of which being the blower motor for the heater and a/c doesn't work, the driver side window doesn't work, and the dash pad is pretty much shot (cracked like crazy). Anyway, the dash pad doesn't concern me at this moment, right now I'm more interested in getting the heat working. I haven't been successful in finding a new blower motor yet, anyone have any ideas where I can get one? The guy I bought it from said he was in the process of eliminating the a/c, which I'm ok with, and that I could get a new "box" with just the heater core and a fan. I would be totally ok with going that route if anyone could point me in the right direction that would be much appreciated. I'm new to these cars, but have always been interested in them and I'm hoping to have this one around for a very long time!
2000 Dodge Durango 5.9 (gone, and missed)
2008 Mercedes Benz R320CDI
1985 Merkur XR4Ti

ford.scorpio
Level 4
Level 4
Posts: 395
Joined: Sun Jun 07, 2009 10:20 pm
Location: Suffolk, VA
Contact:

Re: Heater blower motor not working

Post by ford.scorpio » Tue Nov 03, 2015 11:47 am

This might be another option if you eliminate your AC stuff......

Have those if you need them & my contact info is in the following link as well......


viewtopic.php?f=27&t=22286&hilit=euro+blower
A man meets another addict and says "oh yeah, I have a Merkur too!" and the other man says "no way!!!!! ............how many?"

Choochoochoo
Level 4
Level 4
Posts: 363
Joined: Sat Oct 31, 2015 11:40 pm

Re: Heater blower motor not working

Post by Choochoochoo » Tue Nov 03, 2015 5:36 pm

Any suggestions on how to attempt a revival of the motor before I spend money on a different unit? Just trying to save money for some suspension currently..
2000 Dodge Durango 5.9 (gone, and missed)
2008 Mercedes Benz R320CDI
1985 Merkur XR4Ti

ford.scorpio
Level 4
Level 4
Posts: 395
Joined: Sun Jun 07, 2009 10:20 pm
Location: Suffolk, VA
Contact:

Re: Heater blower motor not working

Post by ford.scorpio » Wed Nov 04, 2015 9:55 am

Since you are looking for a new/used blower motor, you have already verified that all fuses/relays/switches/coil are in good shape and it is indeed shot/seized blower motor?

Do you have a shop manual? If not, there are hard copies floating on evilBay or mc2 racing has CD/digital version available....
A man meets another addict and says "oh yeah, I have a Merkur too!" and the other man says "no way!!!!! ............how many?"

Choochoochoo
Level 4
Level 4
Posts: 363
Joined: Sat Oct 31, 2015 11:40 pm

Re: Heater blower motor not working

Post by Choochoochoo » Wed Nov 04, 2015 1:28 pm

The guy I bought it from told me it was likely seized from sitting for so long. I haven't had a chance to actually tear into it yet as its at my parents place and I haven't been able to get there and get it registered. I will check all the fuses before I start the tear down, I'm just looking for any advice on how to go about this before I start. I do not yet have a service manual, but will hopefully soon have one.
2000 Dodge Durango 5.9 (gone, and missed)
2008 Mercedes Benz R320CDI
1985 Merkur XR4Ti

User avatar
mhamilton
Level 6
Level 6
Posts: 831
Joined: Tue Jan 14, 2003 11:04 pm
Location: Carroll (Columbus), Ohio

Re: Heater blower motor not working

Post by mhamilton » Wed Nov 04, 2015 8:57 pm

So, the blower does not come on at all? It's and easier fix if it blows only one speed (as in on high).
"Head for the Hills, the Town of Lompach is Under Water!"

User avatar
In XS 7
Level 7
Level 7
Posts: 1545
Joined: Tue Feb 21, 2012 1:29 am
Location: Kewanee, IL

Re: Heater blower motor not working

Post by In XS 7 » Wed Nov 04, 2015 9:47 pm

If the blower is bad we have a member here who can rebuild it.
Miguel.
89 XR4Ti Monique; Waking up a real "Night/Mare-Coor".
T5, NPR IC, PIMP ECU, Walbro 255, Dual piston BOV, Manual BC, 3" exhaust, One piece Aluminum drive-shaft, mc2 LSD, Boport 1.5 cam, Ported and polish head, big valves, 80# injectors, Bob's log, (soon HY35).

Choochoochoo
Level 4
Level 4
Posts: 363
Joined: Sat Oct 31, 2015 11:40 pm

Re: Heater blower motor not working

Post by Choochoochoo » Wed Nov 04, 2015 10:51 pm

No fan at all, it currently doesn't work. Like I said above, I haven't gotten to tear into it yet, so I'm not sure if it's frozen or non functional...
2000 Dodge Durango 5.9 (gone, and missed)
2008 Mercedes Benz R320CDI
1985 Merkur XR4Ti

User avatar
Mike McCreight
Level 7
Level 7
Posts: 3979
Joined: Fri Oct 31, 2003 8:44 pm
Location: Ottawa! Well, Manotick, actually...

Re: Heater blower motor not working

Post by Mike McCreight » Thu Nov 05, 2015 10:12 am

Seriously, you're going to be needing a shop manual anyway, so start there, I typically ship one free with any purchase. They're available all over. First think I'd check is the ground. The EVTM supplement to the manual shows the ground points.
There's 2 main failure points, a thermal limiting switch, like in a hair dryer, the contacts fail, and the brushes wear out, or after 20+ years, hang up in the housings.
There's the shop manual approach to getting at the motor, and the backyard method. 1st way involves removing the whole housing, the 2nd, cutting it straight down from the opening where the "resistor" pack is, and removing the motor by removing about 5 screws in total. The 1st method, while being the purists approach, involves a LOT more fasteners and time.
It's not a hobby, it's an obsession!

User avatar
eaton53
Level 5
Level 5
Posts: 521
Joined: Wed May 06, 2015 6:08 am
Location: Silvis, IL

Re: Heater blower motor not working

Post by eaton53 » Thu Nov 05, 2015 11:44 am

Mike McCreight wrote:There's the shop manual approach to getting at the motor, and the backyard method. 1st way involves removing the whole housing, the 2nd, cutting it straight down from the opening where the "resistor" pack is, and removing the motor by removing about 5 screws in total. The 1st method, while being the purists approach, involves a LOT more fasteners and time.
I used the backyard method in my old 85' XR.
Dang thing chucked several of those resistors. Actually, that was the first thing I thought of when I saw this thread.
Mark Copeland - I'm 50 miles west of Kewanee, IL

'89 XR4Ti
Car was the 2014 MCA Merkur Preservation Award Winner
I'm just the latest caretaker and I'm keepin' it REAL shiny!! 8)

Ed Lijewski
Level 8
Posts: 7157
Joined: Thu Sep 04, 2003 5:53 pm
Location: The Belly of The Beast

Re: Heater blower motor not working

Post by Ed Lijewski » Thu Nov 05, 2015 1:44 pm

Resistor in a sense but correctly a thermal fuse (breaks if over set temperature).

YMMV 8)
Descartes: "Cogito Ergo Sum"
Lijewski: "Sum Ergo Drive-O. Mucho!

User avatar
Mike McCreight
Level 7
Level 7
Posts: 3979
Joined: Fri Oct 31, 2003 8:44 pm
Location: Ottawa! Well, Manotick, actually...

Re: Heater blower motor not working

Post by Mike McCreight » Thu Nov 05, 2015 6:52 pm

Yup.
The little bullet shaped thing is a thermal fuse.
There's also a device on the motor itself.
Whenever I have a blower motor apart, I bypass the thing.
It's not a hobby, it's an obsession!

Ed Lijewski
Level 8
Posts: 7157
Joined: Thu Sep 04, 2003 5:53 pm
Location: The Belly of The Beast

Re: Heater blower motor not working

Post by Ed Lijewski » Fri Nov 06, 2015 7:02 am

Image

Video: Vauxhall Zafira fires: 220,000 cars to be recalled; chairman ...
The Telegraph › uk › ... › Motoring Video
Mobile-friendly - 1 hour ago - Vauxhall chief Rory Harvey says Zafira fires caused by resistor and fuse in heating system, and ...

YMMV 8)
Descartes: "Cogito Ergo Sum"
Lijewski: "Sum Ergo Drive-O. Mucho!

my8950
Level 5
Level 5
Posts: 787
Joined: Wed Jan 19, 2005 11:07 pm
Location: Detroit

Re: Heater blower motor not working

Post by my8950 » Fri Nov 06, 2015 1:54 pm

Motor is seized meaning it doesn't spin when you turn the blower switch in the car on?
If that is a yes, then check fuses and relays as mentioned.
Otherwise, what about removing the underhood connector and putting power to it from the battery?
That will tell you if it is seized or not.
My car has no blower switch on the interior, so technically my blower doesn't work either.

Ed Lijewski
Level 8
Posts: 7157
Joined: Thu Sep 04, 2003 5:53 pm
Location: The Belly of The Beast

Re: Heater blower motor not working

Post by Ed Lijewski » Fri Nov 06, 2015 3:01 pm

There is no relay in the blower power circuit; a #30 amp fuse protects it.

YMMV 8)
Descartes: "Cogito Ergo Sum"
Lijewski: "Sum Ergo Drive-O. Mucho!

Post Reply