Automatic fan

[Cocoloco]

Hello good day!
What temperature do our radiator fan starts working, i mean how many bars

I bought the bike with its own switch to radiator fan, ive rewired it to stock harness to have an automatic fan, but cant seem to make it work
The fan it self is running when i put dirext power to it

 

[PauliusD]

Mine usually comes one when the bikes has been sitting at 4 bars for a few minutes

 

[Gary in NJ]

There are two parts at play here; the fan relay and the coolant temperature sensor. While one or both may have failed, it is more likely that there is corrosion at the connectors. I would split the connectors, clean with contact cleaner and reassemble with dielectric grease. See if this solves the problem prior to throwing parts at the problem.

 

[Motogiro]

Also this info which may help in trouble shooting and understanding fan function. https://600riders.com/threads/radiator-fan.59996/#post-649585

 

[Cocoloco]

Thank you everyone!