Bmw E90 Radiator Fan Test

The fan is mounted between the radiator and the engine and is the main engine cooling fan.

Bmw e90 radiator fan test.

When a bmw e90 cooling fan fails the fan will not activate or only activate at high speed. The cooling fan is responsible for maintaining proper engine coolant temperature and a c cooling. There is no engine driven mechanical fan. One of the most common failure points on aging bmw s is the cooling system.

Bmw e90 models utilize an electronic cooling fan integrated into the cooling fan shroud. Mine broke which caused overheating of the car. So a engine cooling fan failure. Or a failure of the fan relay or control circuit is bad news.

On a bmw this is a mix of monoethylene glycol and distilled water. In this video i show you how to test to see if your fan switch is working. While waiting for my car to cool after doing a radiator flush i decided to google how to test temp and fan on a e90 put key in press start button once dash lights are on press the reset odometer button and hold till it brings up the hidden menu display the first menu should look like this. When repairing the cooling fan and shroud are replaced as a unit.

Feel free to comment and ask quest. On all bmw models up through the late 90s the auxiliary or main fan is controlled by one or two thermostatic switches that are mounted into the radiator side or bottom tanks. Bmw cooling system fundamentals the engine hoses radiator and expansion tank are filled with coolant mixture. The water pump circulates the coolant and keeps the system pressurized.

The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. Because it can allow the engine to overheat. The engine cooling fan only runs when needed to help cool the engine. It is especially noticeable on higher mileage cars or vehicles that have sustained a front end impact somewhere along their.