[MR2] AW-11 Blower Motor seems weak on high setting

[hausherrs at sbcglobal.net]

In an 87 mudstain I had back in high school the out put shaft bearing of the  
ac wore out and threw the alignment of the blower of. It would sound like it  
was spinning full speed but only blew half the amount of air it should have  
been. Car had 180k miles on it.

Thanks

Steven

Sent via DROID on Verizon Wireless

-----Original message-----
From: Kurt Krueger <telek2 at frontier.com>
To: mr2 at mr2.com
Sent: Wed, Jun 15, 2011 14:19:20 GMT+00:00
Subject: Re: [MR2] AW-11 Blower Motor seems weak on high setting

On 6/14/2011 9:33 PM, William Brandt wrote:
> This seems weird but the blower has never been changed in 25 years and  
285,000 miles - it goes through the 4 speeds on the switch and yet on "high"  
the airflow seems weak -
>
> Does that make any sense? (I can say no and yet.....)
>
> It it a simple brush electric motor?
>
> Since I really can't remember the airflow 20 years ago it is impossible to  
compare -
>
> Bill
> _______________________________________________
> MR2 Mailing List
> MR2 at mr2.com
> http://mr2.com/mailman/listinfo/mr2_mr2.com
High speed applies 12v directly to the motor, bypassing the resistor 
pack.  So you could have a connection problem in that part of the 
circuit.  Best test would be to put a voltmeter across the blower 
terminals and see what you get.  Try all the speeds.  The fan draws a 
lot of current, so I don't expect full voltage on high.  But it should 
be close, and definitely higher than on the slower speeds.

And yes, it is a simple brush motor.

Another thing ... there's lots of foam gaskets on the flaps that control 
air flow.  Rotted foam could cause air routing problems.  I had the 
extreme case on a Corolla that sat for a couple of years ... mice 
plugged the air ducts.

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