You probably have a faulty rear temperature blend door actuator. Remove the left rear trim panel to access it.
Be sure to review "Related Questions" below for much much more on Windstar heating/cooling problems
To the right
Most likely the rear expansion tube or valve is defective.
You will need to replace the rear expansion block valve and the recharge the system with freon and oil..............
bad wheel bearings
Possibly a bad wheel bearing.
That's a toughy... Water pump maybe(?)If not, be sure to see "Related Questions" below for more diagnosing/trouble-shooting/fixing ideas and information.
what causes the rear lights to stay on while engine is running. the car is park
The boxer knows his blows, while the sick man blows his nose.
Only one will turn, if you hold the pass side the driver side will start to turn.
One cause of a popping noise from the front end while backing up in cold weather is the drive shaft. A mechanic can help find the problem.
A cold front stays on the ground, while the warm air mass rises to the sky and condenses into clouds.
A worn out Universal joint in the rear driveshaft.