This 3000 Series HVAC manual is the 246-page International Trucks service section, publication S16025, covering the heat, ventilation and air conditioning system on medium-duty 3000 Series trucks. Released 11/23/2005 by International Truck and Engine Corporation, it documents component operation, mode control logic, R-134a refrigerant charging and circuit troubleshooting.
Official document details
| Brand | International Trucks (Navistar) |
| Model coverage | 3200, 4100, 4200, 4300, 4400, 7300, 7400, 7500, 7600, 7700, 8500, 8600 |
| System / Group | 3000 Series / HVAC |
| Publication no. | S16025 |
| Revision | 11/23/2005 |
| Pages | 246 |
| File size | 3.4 MB |
| Format | |
| Language | English |
What this 3000 Series HVAC manual covers
- Safety precautions and general system description
- Components: compressor and clutch, condenser, pressure transducer, orifice tube, evaporator, accumulator and heater core
- General operation, control assembly and blower fan speed control
- Temperature control and mode control (MAX A/C, NORM, Bi-Level, Vent, Floor, Mix and Defrost)
- System maintenance, A/C performance test and R-134a refrigerant charging
- Troubleshooting charts, including the HVAC recirculation motor circuit and AC pressure transducer circuit
The later sections add the System Pressure versus Ambient Temperature chart for R-134a refrigerant, thermistor and pressure-transducer test values, and A/C performance-test steps that a technician records against the gauge readings. Each component is described first, then supported by a dedicated troubleshooting table, so a technician can move from symptom to circuit test without leaving the section.
Applicable truck models
The procedures apply to medium and heavy-duty International 3000, 4000, 7000 and 8000 series chassis listed on the cover, models 3200 through 8600, built with the factory HVAC system and electrical system controller. Confirm your build date and trim before ordering parts, and verify coverage against the vehicle on the official International Trucks website. Always match the vehicle identification number before beginning any repair.
Who needs this 3000 Series HVAC manual
Fleet and dealer technicians diagnosing weak airflow, poor cooling or blower faults rely on the Series HVAC manual to trace circuits through the HVAC control panel and confirm R-134a refrigerant pressures before condemning a compressor. The full PDF is available in the DiagTechPro manuals library, free account required to download.
Related manuals library
