V-6 thermostatically controlled cooling fan - on when cold - new behaviour

[jacekk]

What controls the V-6 thermostatically controlled cooling fan?
My 2005 v6, runs perfectly well, never overheats but I noticed recently that the electric cooling fan comes on a minute after a cold start.
Runs for a couple of minutes an then turns itself off until needed - i think. At least, I can't hear it when driving.

This is new behaviour - it only used to come on rarely, when the engine was quite hot and the AC blowing cold.
Any ideas or suggestions as to what is causing this?

The thermostat was replaced about 20k miles ago.

Thank you.

 

[KRUISR]

I know this thread is over a year old but for anyone still looking...

Do you have your defroster on? If you do, the AC will run almost immediately on start up as the HVAC will dehumidify the air (irrelevant of the temperature set point) before blowing it on the windshield. I get my fans running on my truck on start up even when it is -20 C outside because of this.

 

[jacekk]

I know this thread is over a year old but for anyone still looking...

Do you have your defroster on? If you do, the AC will run almost immediately on start up as the HVAC will dehumidify the air (irrelevant of the temperature set point) before blowing it on the windshield. I get my fans running on my truck on start up even when it is -20 C outside because of this.

Thank you for your response.
Yeah, it is definitely the AC that turns the fan on immediately. I owned the car for several years before I noticed this behaviour.
It does turn the fan on and off while running, but when it's cold, it comes on immediately as soon as the AC is turned on, or if the AC is already on when starting.