And you just answered your own question on that second line. And it's not just the compressor with seals. Everything ac related in your car has a connection that involves seals.Maybe not recommended but would it be bennificial for fuel mileage improvement during colder months? Truthfully vehicles defrosted windshields for years without A/C
only think i woildnt like about the unplug would be no use would allow the seal in compressor to dry up and fail. So if unplugged all winter long you may end up replacing compressor in the spring.
The compressor is tied in to the defrost so that it gets occasional use to keep everything lubricated and functioning come next year. Otherwise, think of the massive increase in ac repairs.
Supposedly it also helps to dry out the moisture on defrost. Those of us on the west, only have moisture when it's raining or snowing. Or frost. Or whatever. As compared to the east coast where it's almost always humid.
Us westerners really wouldn't notice the moisture dillemma the easterners have.