The screeching noise is most likely the blower motor. Either the motor itself is bad or the fan blades are striking the housing. Run the heat without defrost and see if the noise is the same. Also check at different fan speeds to see if the noise changes.
You probably have a bad bearing.
Loose belt - will sound like a screeching noise.
Fruit bats.
why does my starter make a loud screeching noise when i start it?
Compressor locked up.
a screeching noise
The cause of a loud screeching noise when a person turns the wheels a little, could be due to the lack of power steering fluid. It could also be due to worn belts.
POTATOES and YOUR MOM
A pig grunts or squeals
Eagles make a screeching noise
under the dash? could be seat warning/door buzzer going wacky. under the hood? could be coolant fan running tight. need more info.
good chance the fan belt is slipping when driving may need tightning up this wouold cause a screeching noise.