Air Conditioner problems of the 2007 Ford Focus

Had to replace the power steering unit, replaced computer chips still comes on saying check engine, section of air conditioner rusted through, a small leak, have to keep getting it recharged.

The contact owns a 2007 Ford Focus. The contact stated that while parked, the contact turned the air conditioning on to levels 3 & 4 and noticed that the air would not blow. The failure recurred on one other occasion. The vehicle was taken to an independent mechanic where it was diagnosed that the pigtail and the switch melted together. The vehicle was not repaired. The manufacturer was not made aware of the failure. The VIN was unavailable. The approximate failure mileage was 140,000.

My air conditioner quit working to soon only about 4 years old at the time was told by mechanic that my compressor was out completly. I also have changed my low beam head light about 4 times why? another problem I have is my rear end tires keep wearing out way faster than the front tires why? also while I drive my car squeaks the noise comes from my dash and under my dash more so when I drive slower like around town also why?.