Light humming noise i hear from the car.

[andrewsg]

When the car stays on in a stationery position i hear a light humming noise after 15 to 20 min. not sure though where its coming from. What should be done now

[Dollabill]

Are you idling with the motor on? Whereabouts does the humming come from?

[andrewsg]

there was no idling only humming from front engine.