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93 850 Recirc damper motor calibration?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

850man
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Year and Model: 1993 850 GLT
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850man

93 850 Recirc damper motor calibration?

Post by 850man » Sat Oct 19, 2019 12:01 pm

I am installing a good used replacement recirc air damper motor (Volvo #6849557).
6849557 damper motor.jpg

I connected/ installed motor and observed the actuation rotation (angle) exceeds the damper arm's travel, causing noticeable motor to bog under this stress.

I carefully opened the motor and everything looks great (gears, lubrication, "potentiometer" tracks free of debris, etc.)

**Is there a ECC recirc damper motor calibration required? If so, can someone share with me this procedure so I can reduce the motor rotation? Other suggestions? Thanks!
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jreed
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Year and Model: '97 Volvo 855 GLT
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jreed

Re: 93 850 Recirc damper motor calibration?

Post by jreed » Sat Oct 19, 2019 3:35 pm

I haven't done the calibration procedure before, so I can't offer help on that.
But, I have replaced the damper motors before. If you rotate the replacement damper to the same position that the old one was in when you removed it, you may not have to do a recalibration.
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1997 855 GLT (Light Pressure Turbo) still going strong. Previous: 1986 240 GL rusted out in '06, 1985 Saab 900T rusted out in '95, 1975 Saab 99 rusted out in '95, 1973 Saab 99 rusted out in '94

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