Bmw E90 Radiator Fan Test

Bmw e90 models utilize an electronic cooling fan integrated into the cooling fan shroud.

Bmw e90 radiator fan test.

The fan is mounted between the radiator and the engine and is the main engine cooling fan. It is especially noticeable on higher mileage cars or vehicles that have sustained a front end impact somewhere along their. The cooling fan is responsible for maintaining proper engine coolant temperature and a c cooling. When a bmw e90 cooling fan fails the fan will not activate or only activate at high speed.

Or a failure of the fan relay or control circuit is bad news. 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. Mine broke which caused overheating of the car. Bmw cooling system fundamentals the engine hoses radiator and expansion tank are filled with coolant mixture.

Bmw 3 series e90 e92 forum bmw e90 e92 e93 3 series general forums regional forums uk e90 how does radiator fan work. When repairing the cooling fan and shroud are replaced as a unit. Search this thread 03 18 2008 08 57 am 1. In this video i show you how to test to see if your fan switch is working.

One of the most common failure points on aging bmw s is the cooling system. 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. The water pump circulates the coolant and keeps the system pressurized. The engine cooling fan only runs when needed to help cool the engine.

So a engine cooling fan failure. Because it can allow the engine to overheat. On a bmw this is a mix of monoethylene glycol and distilled water. Feel free to comment and ask quest.