Car47

I have a 2005, 4.6 L, STX model. When the blower is turned on, about once or twice a minute you will hear a switch-like sound. Similiar to something switching open or closed. I turn the blower off and the sound goes away. Everything works fine. Anyone ever has this or have any idea what it might be?

alsatropine

iTrader: (2)

Sounds like either the blower motor is going out or the blower motor resistor is going bad...

Especial86

iTrader: (1)

It could be the blend door for defrost getting snagged.
If it was a resistor pack you would probably have issues with certain blower speeds not working with the AC on.