"Dave Plowman (News)" > wrote
> Malt_Hound > wrote:
>> >>Most cars' blower motor controls are set to run the fan at low speed
>> >>all the time while the AC compressor is engaged. It's done to keep
>> >>air flowing through the evaporator matrix to prevent ice from building
>> >>up on it.
>> >
>> >
>> > Eh? It gets hot, not cold. ;-)
>> >
>
>> Nope. Evaporator gets cold...
>
> Which heat exchanger are we talking about? The aux fan runs continually to
> keep the condenser cool. The interior fan may be switched off, as
> there's a probe in that heat exchanger to prevent iceing.

The AIR passing through the evaporator gets cold, the REFRIGERANT (R12 or
R34)
that is going through the liquid-to-gas phase-change inside it is getting
hot.
Opposite in the condenser.

Floyd