Initial Inspection and Diagnostic Overview

TROUBLESHOOTING HINTS

Try the following checks before doing the System Diagnosis.

1. Check for manifold vacuum to the Vacuum Tank at the BLACK hose from the engine and at the VIOLET hose to the A/C Control Head.

2. Check operation of Temperature Door by moving the Temperature Selector Lever rapidly back and forth several times. Listen for the door to strike the stop at each end of its travel. If the sound indicates that the door is not fully closing or opening, check the mechanical linkage between the door and the Temperature Selector Lever.

^ Go to the A/C System Check for a guide to normal operation and diagnostic references for the entire A/C System.

^ Go to System Diagnosis to isolate air delivery conditions.