E34, E36, E36/7. if you use the a/c, its a good idea to have an aux fan there because without that your a/c system may heat up and build up too much pressure. the aux fan is there with the a/c to keep the condensor cooled so it doesnt over pressurize the freon and essentially explode. (been there before. not fun) If low speed does not come on: With the aux fan low temp (green/black to black) switch jumped, check for voltage on both sides of fuse 3. If you have no voltage, the K1 relay is suspect. If there is any appreciable difference across the fuse, replace the fuse. Check for voltage at aux fan resistor on the black wire.
The most common reasons a BMW X3 radiator fan isn't working are the fan assembly, the fan clutch, or the coolant temperature sensor. 0 %. 45 % of the time it's the.
AC/Heat fan not working on e90? Bimmerpost ☰ Model Selection. 1. F40Model Year: 2019 + Before that: 2007 BMW 335i Coupe - ZSP. Appreciate 0 Quote
The most common causes for AC fan blower motor not working in BMW 4 Series are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.
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bmw ac fan not working