FordFrenzy06

This is not a big deal, I'm just curious as to what it might be. First off its a 2006 5.4 4x4. When I get in the truck in the morning to go to work, as soon as I get in, I can hear a slight humming noise. This is before I even start the truck and only lasts like 5 seconds like something is activated when I open the door. Its almost like an electric motor running. Its so faint that I can't even tell where its coming from. As far as I can tell it doesn't affect the way the truck runs so its not a big deal I was just curios if anyone else has this issue or knows what the sound is.

Blue2016XL

Probably the fuel pump pressurizing the system if it needs it in preparation for the engine being started.

techrep

iTrader: (1)

Blue2016XL

Okay, I figured it was triggered by the door opening.

FordFrenzy06

Sounds like it could be coming from under the dash somewhere which wouldn't be the fuel pump.

techrep

iTrader: (1)

Blend door motor froze up ?

cebby515

The blend door shouldn't be moving before the key is put in the ignition.

FordFrenzy06

Nope works fine. I hear it before I even put the key in the ignition as soon as I open my door.

cebby515

While walking down to grab my lunch at work... Does your door chime work?

FordFrenzy06

Yes but only chimes when the key is in the ignition. Pretty sure that's normal.