Ksturgio

I have an 07 fx4 with manual climate control. Randomly while driving the fan will shut itself off (usually when on the 3 or 4 setting). When it shuts itself off if I switch the dial to zero then back on it functions normally again. Any ideas on what is causing this?

techrep

iTrader: (1)

Blower motor resistor...?

Rick's 06

The switch in the module might be acting up as well. I've noticed the opposite problem on mine. Some mornings when I start the truck with the blower off, it will still blow full blast for several seconds before it shuts off.

Ksturgio

that's what I thought at first but why would it work on any speed not just high? Also I'm no electrician.