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General E46 Forum
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Old 06-20-2013, 02:12 PM   #21
Yewzer B Lewzer
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Join Date: Jan 2013
Location: St. Petersburg FL
Posts: 1,200
My Ride: 2003 325i
Recharging AC refrigerant with Arctic Freeze product

Quote:
Originally Posted by jdstrickland View Post
It is illogical that the level of the refridgerant will affect one side of the car, but not the other. There is only one evaporator, and all of the air passes over it. But, what do I know? Warm air is surely one of the indicators of low refridgerant.
The reason is that with low refrigerant, the energy absorption of the evaporator is less. The evaporator itself gets warmer as the refrigerant moves across it, or in other words the inlet side coils would be cold but the outlet side coils would be warm (warmed by the air passing through). The air that passes through the evaporator is quickly channelled to different ducts before it has had a chance to mix.

I've seen the same thing on a Honda accord. This will affect different vehicle designs in different ways depending on evaporator and duct design.


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