Volvo AWD 850 Forum

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blower motor problems in 850 please help 850

posted by  someone claiming to be John S on  Mon Jan 17 12:28 CST 2005 [RELATED]

Well the guy I bought this from 2 days ago said the blower motor needed to be replaced, I took it out of the dash tonight and applied 12 volts to the motor, it spins up just fine.


I checked the Voltage at the connector feeding the motor and only got 6-7 volts.


Changing the fan control did not change the reading of the voltage.

I dont know if this has electronic climate control or not- theres 2 dials on the dash one for passanger one for driver, and I get the AC and REC lights blinking 18 times when I start the car.

Please help, its 16 degrees out and its supposed to be 5 degrees tommorow!!


-John








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    blower motor problems in 850 please help 850

    posted by  someone claiming to be sumpmnu on  Wed Jan 19 14:26 CST 2005 [RELATED]

    This is interesting. If I have time tomorrow I will look at the diagram. What year is it? Typically on the ECC the voltage is constant and the ground is controlled through resistor (the gizmo mounted to the left of the motor with the cooling fins). Volvo is notorious for bad solder joints in the electronics.
    Sometimes you may even read 12 volts until you put it under load then the resistance is so high at the loose pin that no current can be conducted through it.
    It could be a bad relay with loads of resistance in the contacts also. Just don't know exactly. If I find out more will pass it on.








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    blower motor problems in 850 please help 850

    posted by  KlausC on  Tue Jan 18 07:05 CST 2005
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    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    I guess cold is all relative. Next to the blower motor was a resister box which is probably bad. Did the fan work when you put it on high? An ECC unit will have temperature grades on the two comfort dials instead of red/green paint stuff.

    You can also check all of your ECC codes in the engine compartment (B1). Write them down and reset them to 1-1-1. Things work better when there are no codes at all.
    --
    98 V70Rawd(101Kmi), 95 854T(85K mi), 75 164E(173K mi)








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    blower motor problems in 850 please help 850

    posted by  someone claiming to be John S on  Mon Jan 17 12:29 CST 2005 [RELATED]

    it is a '94 850 Turbo by the way.







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