Can anybody out there driving a 2007 or 2008 Fit tell me how often and under what conditions they hear their radiator fan come on? I just replaced a head gasket on my 2008, and I don't hear my radiator fan coming on. My a/c fan comes on as soon as I turn on the a/c. I checked the radiator fan motor, coolant sensors 1and 2, and fan relay, thermostat and they all check good.

 

Both fans should be on or off simultaneously, not just one.
the coolant thermo-sensor at the bottom tank of the radiator controls fan operation (for cooling)

 

So when the A/C is off, and the engine gets hot, both fans turn on?

 

Yes,exactly!

 

If the coolant thermo-sensor( ECT2) at the bottom tank of the radiator controls fan operation of both the a/c and the engine radiator fans, what does the coolant temp sensor (ECT 1) up in the head by the thermostat do?

 

Primary fuel injection calculations

 

Thanks everybody for the replys!

 

Read my head gasket tour thread,, same issue, the GD does not turn the fans on till like 230 on the sensor,,, I added a 190 thermo-switch relay and tied it to the driver side fan wire. Keeps the car under 200 nicely, usually about the 185 just like the thermostat in the engine wants..

 

Perhaps tricking the ECM to turning on the rad. fan early by a lower value ECT2?

 

"Both fans should be on or off simultaneously, not just one.
the coolant thermo-sensor at the bottom tank of the radiator controls fan operation (for cooling)"
Does this also apply to a Honda jazz/fit from 2013? Since I can't find any other fan switch. Best regards Erik