Fitment: 2011 Kenworth C500 2008-2013 Kenworth T800 2010-2013 Kenworth W900 2008 2010-2011 Peterbilt 367 2008-2011 Peterbilt 387 2008-2011 Peterbilt 388 2010 Peterbilt 389 Information About AC Condenser 1.Such condensers typically also use a fan to force air through the heat sink and away from the tropics. Refrigeration principle of the general refrigerator The function of the compressor is to compress the steam with lower pressure into steam with higher pressure, so that the volume of the steam is reduced and the pressure is increased. .