The cabin blower and the engine cooling fan are electric motors whose speed has to be controlled. The simplest control is a resistor pack: a set of resistors in the blower’s air stream that drop the voltage for each of the lower speeds, while the highest speed bypasses them. Cars with automatic climate control use an electronic regulator instead, a finned power module that sets the motor speed steplessly on a signal from the climate control unit. The engine cooling fan has its own control module of the same kind on many modern cars.
These parts carry the whole current of the motor and run hot by design. They fail when the resistor wire burns through, when the electronics overheat because the blower is weak or the air filter is blocked, or when the connector pins corrode and burn. The typical symptom is a blower that runs only at full speed, or not at all, or a cooling fan that runs constantly or never.
KRONTEK blower resistors, regulators and fan control modules are made to OEM-compliant quality and as aftermarket spare parts: the connector, the mounting and the electrical values of the original, so the part plugs into the original loom and sits in the original air stream.
The range covers European and Japanese passenger cars. Each reference is identified by the OE number of the original part; send that number and the vehicle identification number (VIN) and we confirm the matching KRONTEK reference.
For availability and OE cross-references, contact us by email.