I've noticed something with my truck, and I was wondering if anyone else has seen it too. I have MFT and automatic climate control BUT even when operated in the MANUAL MODE(the auto mode light is off) when I park the truck in the evening, I'll have the fan on the second step and I push the main HVAC control button to shut down the entire system. When I start the truck in the morning(and really cold outside), and I push the main control button to "on",the fan will increase speed on it's own, as the engine warms up. It's not a big deal, but it is a PITA constantly turn the fan down. BTW, I also have the temp set to high- if that makes a difference. Could one or two of you guys that live up here on the tundra try it and see if your trucks responds the same? the stealership will just call it normal- we all know that.

 

If you have you temp set to high in auto mode it will run your fan at the highest speed likewise if you have it set to low and the inside temp is hot it will again run your fan fast if you don't want that to happen leave the auto button off

 

I made a point of saying the auto button is off when this happens.

 

I miss read it I'll go try it now it's -31 out

 

Mine does this as well