When the defroster is turned on, the following typically occurs:
* The air conditioning compressor turns on.
* The air conditioning system begins to circulate cold air through the vehicle's vents.
* The cold air helps to remove moisture from the air and prevents the windows from fogging up.
It's worth noting that the specific behavior of the air conditioning system may vary depending on the make and model of the vehicle. In some cases, the air conditioning compressor may not turn on if the outside temperature is too low or if the defroster is only set to a low setting.
