replace it, they are pretty much nonserviceable now
Do you mean that the AC clutch does not engage the compressor? Or do you mean that the AC compressor won't turn even if the clutch is engaged? If the compressor is siezed and will not turn even if the clutch is engaged, the only choice is to replace the compressor. If you can turn the compressor by hand (understand that the belt pulley will turn freely with the engine if the clutch isn't engaged) but the compressor clutch isn't engaging, it might just be out of refrigerant. There is a sensor, usually somewhere near the receiver/dryer) that detects the "low side" refrigerant pressure. Once the refrigerant pressure at the sensor drops below a specified level, the compressor will not turn on. In other words, if the compressor clutch won't engage it might just be out of refrigerant.
It could be due to cold temperatures, yes.
The car seats because of the extra energy it needs for the AC compressor work
Yes, Because it won't work right if you do not oil.
what is the meaning of compressor.and how does compressor work.and how many types of compressors
Same way a non rotary compressor works
the compressor is coupled with engine.when the engine runs at 1000 rpm ,the compressor also will work at that rpm ,so that is air is compressed in tanks and it is used for applying.
If the compressor has stopped running altogether the AC will not work.
yes but if the compressor does not work there is no reason for it.
because the compressor must be running to circulate the refrigerant in the system
It is possible the air compressor is bad. You will need to replace the air compressor, so the air will work again.
An air compressor will not work in outer space as it requires air to compress. Without air molecules to compress, the compressor cannot function. Condensation will not form in the air tank in the absence of an atmosphere or water vapor.