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Q: blower motor blow on low speed only on 1992 Mercedes-Benz 300E

blower motor blow at low speed could it be the fan speed
resistor
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Fuse 12 (15 amp) and fuse 15 (30 amp) supply power to the blower control module The control module controls the speed of the fan by varying voltage or ground to the fan, likely the module has failed.
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