Dodge Durango

 Service Manual

Heating and Air Conditioning » Diagnosis and testing
Refrigerant system service equipment

WARNING: EYE PROTECTION MUST BE WORN WHEN SERVICING AN AIR CONDITIONING REFRIGERANT SYSTEM. TURN OFF (ROTATE CLOCKWISE) ALL VALVES ON THE EQUIPMENT BEING USED, BEFORE CONNECTING TO OR DISCONNECTING FROM THE REFRIGERANT SYSTEM. FAILURE TO OBSERVE THESE WARNINGS MAY RESULT IN PERSONAL INJURY.

When servicing the air conditioning system, a R-134a refrigerant recovery/recycling/charging station that meets SAE Standard J2210 must be used.

Contact an automotive service equipment supplier for refrigerant recovery/recycling/charging equipment.

Refer to the operating instructions supplied by the equipment manufacturer for the proper care and use of this equipment.

A manifold gauge set may be needed with some recovery/recycling/charging equipment (Fig. 9). The service hoses on the gauge set being used should have manual (turn wheel), or automatic back-flow valves at the service port connector ends. This will prevent refrigerant from being released into the atmosphere.

MANIFOLD GAUGE SET CONNECTIONS

CAUTION: Do not use an R-12 manifold gauge set on an R-134a system. The refrigerants are not compatible and system damage will result.

LOW PRESSURE GAUGE HOSE

The low pressure hose (Blue with Black stripe) attaches to the suction service port. This port is located on the compressor manifold, directly over the suction port of the compressor.

HIGH PRESSURE GAUGE HOSE

The high pressure hose (Red with Black stripe) attaches to the discharge service port. This port is located on the liquid line between the condenser and the evaporator, near the front of the engine compartment.

RECOVERY/RECYCLING/EVACUATION/CHARGING HOSE

The center manifold hose (Yellow, or White, with Black stripe) is used to recover, evacuate, and charge the refrigerant system. When the low or high pressure valves on the manifold gauge set are opened, the refrigerant in the system will escape through this hose.

Fig. 9 Manifold Gauge Set - Typical

1 - HIGH PRESSURE GAUGE

2 - VALVE

3 - VACUUM/REFRIGERANT HOSE (YELLOW W/BLACK STRIPE)

4 - HIGH PRESSURE HOSE (RED W/BLACK STRIPE)

5 - LOW PRESSURE HOSE (BLUE W/BLACK STRIPE)

6 - VALVE

7 - LOW PRESSURE GAUGE

A/c performance

Blower motor

Blower motor relay

Blower motor resistor

Blower motor switch

Compressor

Compressor clutch coil

Electronic cycling clutch switch (front unit only)

Heater-a/c control

Heater performance

Dual function high pressure switch/high pressure cut-off switch

Low pressure cut-off switch

Refrigerant system leaks

Refrigerant system service equipment

Vacuum system