Refrigerant: Testing and Inspection

HEATING / AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION

1. INSPECT REFRIGERANT VOLUME (w/ Sight Glass)

(a) Check the sight glass.

(1) Prepare the vehicle according to the chart below.

(2) Compare the sight glass to the following chart.

*: Bubbles in the sight glass with the vehicle's interior temperature above 35°C (95°F) can be considered normal if cooling is sufficient.

2. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

HINT
The following examples show the readings of a manifold gauge set and the corresponding air conditioning system problems.

(a) Read the manifold gauge pressure when the following conditions are met:

Test conditions:

* Temperature at the air inlet with recirculate selected is 30 to 35°C (86 to 95°F).

* The blower speed is set to high.

* The temperature is set to max cool.

* The A/C switch is on.

* Doors are fully open.

* The power switch is on (READY).

(1) Normally functioning air conditioning system.