My car is making a horrible noise. The faster I go the louder it gets. I have been accused of vacumming while on the phone or being on an airplane. I think the noise is coming from the rear. Any clue to what this might be?

And my blower used to work on 3 and 4 only, then it changed to working on 1 and 2 only and this morning, not working at all . Any clue on this problem?

Thanks in advance for your help!

 

The noise in the back may be your wheel bearings. A constant Focus problem. They do sell new hubs with bearing already installed. The blower problem is most likely a resistor. I believe it's behind the glovebox near the fan.

 

My car is Focus2007,and I have the same trouble as your car,too big noise to listen music.