III-69
Visual Inspection - System Off
Your observations and the corrective measures you take may be different depending
on circumstances. The following inspection procedures are explained in more detail
below:
1. Observe the System
2. Inspect Parts
3. Check Hoses and Fittings
4. Check for Refrigerant Leaks
Use the following procedures as a general rule in performing a visual inspection with
the AC system off:
1. Observe the System
Your first inspection step is to answer the following question if you can:
• Has the vehicle just come in off the road and has the HVAC system
been in use?
• Did the operator or work order explain or describe any problems
about the system?
• Did someone else work on the system yesterday, 700 miles down the
road? Your first inspection step is to answer these questions if you
can.
Even when someone has told you what is wrong with an HVAC
system, you should perform a visual inspection. Always make
a visual inspection before you hook up the manifold gauge set.
Never add refrigerant to a system until you have made a com-
plete visual and performance inspection.
2. Inspect Parts
Look at the system for what might come loose, leak, wear out or become dirty
and not function the way it should. The main points for visual inspection of the
system are emphasized in Figure 7-2.
Inspection & Maintenance
CAUTION
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