Quote:
Originally Posted by boonkgang13k
when the engine is off, the air is not as warm as the engine is on, what should I do?
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When the engine is off the car does not run that easily. What do you do to have it move?
"A/C" as "Air Conditioning" can be used for the purpose in any season. The "Air Cooling" function is fool proof (in modern cars, at least?) and reportedly just does not work in cold weather even if it is "on": regardless automatic climate or not.
See the user manual for usage suggestions and precautions (if any).
Regarding dehumidifying. Those who not only went to school but learned there as well
should be aware (from thermodynamics basics?) that it's a side effect of cooling: the water is being removed from the air by condensing on the cold radiator that's cooling the air (you can find the water underneath the vehicle afterwards). No cooling = no drying. This simple. (A disclaimer: the
refrigerating air cooling is meant, not the
evaporative cooling which wouldn't dehumidify, just the opposite.)
Therefore it's doubtful if air cooling can be used for
defrosting the windows but you can try as the manual suggests.
It should be safe to keep the air cooling on all the time if you don't need that
engine power consumed for it and neither mind some fuel consumption it takes, apparently. Otherwise mind your need for the function and consider turning it off for ultimate efficiency when it's not needed. If it's the dehumidifying you are after (often in cool weather?) and cooling is an unwanted side effect use the air heating function to compensate (and take some heat which might be extra sometimes
off the engine meanwhile) when using air conditioning in manual mode.