Test 1 Temperature From Center Vent

Fig. 5 A/C Performance Test Diagnostic Table:

1. Start engine, warm to operating temperature and allow to idle.
2. Set air distribution to instrument panel outlets.
3. Set temperature control to Full Cold.
4. Set Blower to second speed (2nd. position).
5. Place suitable thermometer in center air outlet.
6. Switch A/C On with NORM A/C button.
7. Raise engine speed to 2000 RPM, maintain during test.
8. Outlet air temperature should drop to below 50°F in less than one minute.
9. If results are not as expected perform "Test 2" and "Test 3", then compare results with table.