Mobile Air Conditioning Society (MACS) Worldwide FEATURES 4 Engine cooling systems: Electric cooling fan operating strategies 8 Elvis Hoffpauir President & Editor-In-Chief elvis@macsw.org Steve Schaeber Technical Editor steve@macsw.org Marion Posen VP Sales & Marketing marion@macsw.org Laina Casey Graphics & Design Manager mcasey@macsw.org 12 16 18 Computer controls for air conditioning compressors Getting legal 19 22 Andrew Fiffick Chairman & CEO chairman-macs@macsw.org The next 609 is here! Properly mixing coolant 26 28 31 32 35 37 4 Mechanical fan clutch diagnosis 12 Selling the right things Ford 6.4L Powerstroke A big bad leak, but where? Recovering the entire charge 22 Blower motor mystery Case study: 1999 Jetta - A/C fuse System charge determination 35 Mobile Air Conditioning Society Mission Statement To be the recognized global authority for the mobile air conditioning and heat transfer industry by: * Providing training and education for the mobile air conditioning and heat transfer industry. * Providing a forum for exchange of trade information on a regional, national and international basis. * Facilitating business between all segments of the industry. * Providing information on legislative and regulatory initiatives that affect the industry and advocating for the industry to legislative bodies. ISSN 1949-3436 2004-12 IAMA Awards Winner www.macsw.org macsworldwide.wordpress.com Spring 2015 * ACTION/NAPA 3http://macsworldwide.wordpress.com http://www.macsw.org http://macsworldwide.wordpress.com