Now modern vehicles are using electric cooling fans for flowing the air properly through the radiator to keep the engine cool. Thus, the cooling fans are using electric motors which are controlled by the relays. Thus, the cooling fans relay controls the engine's cooling fan and allows power to the fans. Go through the slide to know about the way to diagnose the bad cooling fan relay in your BMW.

1. How To Diagnose A
In Your BMW by Tolleson Mechanic?

2. Most modern cars have
electric cooling fans to
pull air through the
radiator to keep the
engine cool.

3. Most modern cars have
electric cooling fans to
pull air through the
radiator to keep the
engine cool.

4. Thus, the cooling fans
are controlled by the
relays which is allowing
power to the fans.

5. When the car
temperature increases
excessively, the cooling
fan relay will be
activated.

6. The following signs
help you to diagnose
the bad cooling fan
relay in your BMW.

7. Failed Cooling Fan

8. Most common signs of
bad cooling fan relay in
your car are the non-
functional cooling fans.

9. If the cooling fan relay
fails, it is unable to
supply power to the
fans and does not
operate.

10. When the car doesn’t
have any forward
motion, it can lead to
engine overheating.

11. Engine Running
Hot

12. Common problem
associated with bad
cooling fan relay is the
engine runs hot or
overheats.

13. If the engine is running
at a higher
temperature, then it is
a sign of malfunctioned
fan relay.

14. When the relay fails, it
is unable to supply
power for the fans to
operate in your car.

15. The Cooling Fan
Stays On

16. If the cooling fans are
staying on at all times,
this is another sign of a
bad cooling fan relay.

17. When the relay shorts
internally, it may cause
power to be
permanently switched
on.

18. Depending on the
wiring setup, this may
force the fan to stay on
even when the car is off.

19. Conclusion

20. Cooling fan relay is
defined as the switch
for the engine's cooling
fans in your BMW.

21. If you suspect any
cooling fan relay
problems, then consult
your mechanic to fix
the problem.

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