most common is lack of frion or other refrigerent .next the motor is siezed(try hitting with blunt object),this seems to work more than it should.
no
no
yes
We are afraid to use the unit 24 hours because it might cause to overheat .What is really the cause of overheating?
Because it might overheat or need a break.
Yes, low coolant will cause it to overheat without the AC; that is not the only reason that will cause overheating however.
The ac compressorThe ac compressor
Low or no freon will cause the AC not to work. Also if the clutch on the AC compressor has failed, or if the compressor itself failed.
AC Compressor
Yes, if the compressor's bearings are bad, usually accompanied by a roaring or squealing noise coming from the compressor's pulley.
Yes---after air goes thru condensor,it is warmer than if ac is off. Clean the radiator
If coolant is up to proper level and cooling fans are working - should not overheat