E30 Aux Fan Resistor

Bmw can supply the correct brackets to mount this fan without mods or drilling extra holes.

E30 aux fan resistor.

Some e30s have a ceramic one by bosch other have a black metal one with cooling fins made by magna. In reading all the posts on the two speed fan i ve learned that the only time the fan runs on the high speed is when the radiator high temperature switch. Non bmw fans have also been fitted. I m planning on getting my a c working this summer and the aux fan is a necessary part of the a c on these cars.

I ve confirmed the resistor is bad so the fan doesn t run. If you get a successful conversion in place i d be very interested in knowing which spal model you use. 17 40 1 373 177 bosch ceramic aux fan resistor 64 12 1 388 069 magna black aux fan resistor. These instructions are for the bosch resistor pictured below on the right.

If you your aux electric fan works on high speed but not on low speed your resistor is likely burnt out. Once the temperature reaches a certain dangerously warm level that the engine driven fan doesn t seem to be compensating for. The aux fan should activate. These instructions are for the bosch resistor pictured below on the right.

There are two different resistors listed for e30 s the bosch ceramic and the magna plastic encased. E30 aux fan questions. When the ac is on. E30 aux fan resistor replacement and the two different e30 auxiliary fan types rts your total bmw enthusiast.

The only thing i know for sure about the aux fan is that it seems to draw a lot of amps for the amount of air it moves. I noticed in the bentley manual the fan should come on at one of two speeds once the car temperature is a certain level. The high pressure reading reaches 425 then the high pressure switch shuts down the compressor. The auxiliary fan resistor is in need of replacement when the auxiliary fan does not operate at low speed.

Remove the front license plate if present and remove the 2 mounting screws holding the resistor bracket to the aux fan assembly.