Normal System Performance - Service Stall

Fig. 2 Service Stall Test Specifications.:

SERVICE STALL TEST
Record the manifold gauge pressures and outlet temperature with the following preset vehicle conditions:
1. Install thermometer in right center outlet.
2. Open doors and windows to stabilize interior temperature with outside ambient air temperature.
3. Press "Recirc" button.
4. Set temperature lever to full cold.
5. Select 3rd blower speed.
6. Press "A/C" button.
7. With engine warm, run at 2000 RPM.
8. Continue running until system pressures and outlet temperature stabilize (three to five minutes).
9. Record pressure and temperature.
10. Compare readings to normal system performance charts, Fig. 2.