[Anti hero]

Radiator fan only goes on when I unplug the temperature sensor .

when I switch the aircon the fan works . But does not work when driving without aircon .

and works when I unplug the temperature sensor .

hope it makes sense .

kindly help

 

[chase206]

With the temp sensor unplugged the ECU either goes into a fault mode and turns on the fans as a safety OR it falsely detects a temperature above 195F which is the approximate trigger temp to flip on your fans. I would recommend replacing the engine coolant temperature sensor and see if that solves your problem.

 

[Anti hero]

With the temp sensor unplugged the ECU either goes into a fault mode and turns on the fans as a safety OR it falsely detects a temperature above 195F which is the approximate trigger temp to flip on your fans. I would recommend replacing the engine coolant temperature sensor and see if that solves your problem.

You are right, changed the engine coolant temperature sensor, problem solved

 

[Charlie-III]

Thanks for closing this out, helps the next person.