VEMOOriginal VEMO QualityArt. V30-77-0004£38.99
Also known as: Blower series resistor, Blower Resistor, Series Resistor, blower, Fan Resistor
OEM & aftermarket heater blower resistor from top brands — compare prices, check fitment, order with free delivery
Shop 98 heater blower resistor from 9 trusted brands including FAST, THERMOTEC, DENSO. Compare prices, check vehicle compatibility, and get free delivery on orders over £50.
The heater blower resistor — also called the blower resistor, fan resistor, blower motor resistor, or series resistor — controls the speed of the cabin heater fan by adding electrical resistance to the motor circuit. On vehicles without electronic climate control, the resistor pack provides the lower fan speeds (1, 2, 3) while the highest speed bypasses the resistor entirely. When the resistor fails, the fan often works only on its highest setting or stops entirely. CarParts247 stocks OEM and aftermarket heater blower resistors from Hella, Siemens VDO, and Febi Bilstein for a broad range of vehicles.
The most common failure pattern is loss of one or more lower fan speeds while the highest speed continues to work. This is because maximum speed bypasses the resistor pack through a direct relay, leaving only the resistor-controlled speeds affected.
The blower resistor is typically mounted in the heater plenum, accessible from the footwell on either the driver or passenger side. Remove the electrical connector and the one or two retaining screws, slide the old unit out, and fit the new resistor in the same orientation. On some vehicles the resistor is cooled by the heater fan airflow — ensure the cooling fins face into the airstream.
Commonly searched OE numbers fitting Heater Blower Resistor from the TecDoc catalogue.
