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Car Forum / Mercedes-Benz Cars / June 2005

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1989 300E AC/Heater blower

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thomcasey@gmail.com - 14 Jun 2005 14:56 GMT
Hello all,

I understand that the blower motor in this car isn't much fun to
replace, so I am asking for some help to make sure the motor is bad.

1. For about two years, the fan motor would intermittently squeak.

2. For the last 3 months, it would take about 5 seconds to spin up.

3.  Now, it will only come on for 5 minutes, and only in the morning
when the temp outside is below 72.

I am suspecting the motor because of it's past performance.  The
AC/Heat work, but you gotta move pretty fast to get airflow.  I have
tried the "under dash wack", but to no avail.  This baby has 241,000
miles on it, and I know the AC has been used alot, since my dad went to
the trouble of having the AC converted.

One last question.  If it is the motor, should I go with just a new
motor, or motor with fans?  There is only a $30.00 difference.

Thanks,
Thom
1989 300E
Tiger - 15 Jun 2005 02:03 GMT
If only $30 difference... go for it.
thomcasey@gmail.com - 15 Jun 2005 03:05 GMT
Thanks, I assume you think it is the motor too?
Tiger - 15 Jun 2005 16:11 GMT
You have to replace the motor... definitely.
Wan-ning Tan - 20 Jun 2005 04:49 GMT
I believe the blower motor on W124 is similar to W201.  If so, yes, it
is more difficult than other models but not terrible.  The procedure
described in the manual looks more difficult than it actually is.

From the symptom, I would suspect the motor.  If it's $30 differnce,
definitely go for the motor with fans.  The time saving and risk to
break fans is much more 'expensive' than $30.

> Hello all,
>
[quoted text clipped - 20 lines]
> Thom
> 1989 300E
thomcasey@gmail.com - 20 Jun 2005 15:58 GMT
Thanks,

I ordered a manual from Haynes of UK a while back. Can you believe that
with as many 124's as there are in the US that they do not have an
American version on sale here.  It cost me 15.99BP plus shipping (just
over 40 bucks US), but it describes the procedure real well.  Now I get
to learn how the Brits speak (Boot, Bonnet, renew, etc...)

Already ordered the motor and fans from ol Rusty.  I look forward to
having some air back in the car by the weekend.
thomcasey@gmail.com - 25 Jun 2005 05:02 GMT
Well, replacing the motor didn't work.  Is it fairly straight forward
to test the power from the dash switch and regulator?
 
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