MACS Recommended Service Procedures
MACS Recommended Service Procedures MACS Recommended Service Procedures © MACSW December 2005 1 of 23 Revision December 2005 MACS Recommended Service Procedures Initial Customer Contact It is important to obtain information from the customer identifying the problem and any previous servicing history prior to attempting repair of the system. • Use of the MACS “Air Conditioning & Heater Customer Questionnaire” will help identify the problem. • Identify service activity on MACS “A/C – Heating – Ventilation – Cooling System Checklist.” Identification of Type of Service Mobile A/C systems are an integral part of the total vehicle and operation of engine cooling fan(s) and the A/C compressor can be controlled by the vehicles’ computer systems resulting in a direct effect on system operation. Cooling Operation • Lack of cooling can be due to many reasons including: o Compressor operation o System Refrigerant Charge and Type ƒ Contaminated refrigerant ƒ Air in system ƒ Too much ...