Bmw Radiator Fan Not Working

If the fan runs at low speed but not on high speed replace the high speed relay.

Bmw radiator fan not working.

Check power and ground at the fan connector. Go to my website and bmw forum. You should make it your daily habit to check the coolant levels in your radiator. If the high speed works but the low speed does not go to step 4.

The manual has a electric fan only behind the radiator. If you notice that the fan motor does not work you will need a replacement. The fan should have been on 100 during an overheat situation. If the coolant level is low you need to refill the coolant to optimum levels.

The auto has an aux fan in the front and a viscous behind the radiator. Bmw e90 radiator fan fuse location and replacement e91 e92 e93 bmw 325i 328i 330i 335i 316d 318d 320d 325d 330d 335d 316i 318i 320i 323i 325xi 328xi 335xi th. The fan will usually store a fault in the dme for activation or ihka system faulted for excess pressure because fan is not coming on. Additional problems can include an issue with the temperature switch the fuse or the cooling fan.

The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. Models with one radiator temp switch with three wires connected to the switch most models 87 89 through late 90s. Get professional help with your vehicle contact us at ultimate bimmer service. Sometimes it feels as if the radiator fan is not working even though it is.

I d suggest you sort out your aux fan if you can not sure how the setup is on the m54. Https amzn to 2dotdpf in this video we will be using maxisys ms908p to test the radiator fan on this bmw. How to test radiator fan on bmw maxicom scanner. If both the low and high speeds do not run go to step 3.

This is possible when the amount of coolant in your system is low. No aux fan on the m54.