9. Record the suction pressure. If the pressure is fluctuating, record the average value.
10. Determine if the suction pressure falls within the normal operating limits using the Normal Refrigerant Suction Pressures 38 - 49°C (100 - 120°F) Ambient (15 - 40% Relative Humidity) chart below.
11. NOTE: Use the following table to guide diagnosis of the refrigerant system if operating pressures are outside normal limits.
NOTE: Proper A/C system diagnosis on vehicles with Variable compressors is dependent on correct refrigerant system charge and tested in ambient temperatures above 70° F. Never replace a Variable compressor without first recovering and recharging the A/C system to vehicle specification and retesting in ambient temperatures above 70° F.
Refer to the chart below.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.