Quote:
Originally Posted by Suberman
It stops when ambient temperatures drop below about 3C.
If you have auto climate control the AC light actually goes out.
You can't dehumidify freezing air using a conventional automotive AC unit because the humidity in the air blocks the evaporator with ice.
Also, unless the car interior is also freezing simply heating the air as it passes into the cabin also "dehumidifies" it by reducing the relative humidity, which is all that matters.
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Going to try this right now, it's well below freezing this morning.