Posts Tagged: Abnormal Auto AC Pressure Gauge readings

Abnormal AC Pressures: What They Mean and How to Fix Them

How to Read Car AC Pressure Gauges Like a Pro Quick Summary Abnormal AC pressures are the fastest way to accurately diagnose car AC problems. • Low low-side and low high-side pressure → usually means low refrigerant or a restriction. • High low-side and high high-side pressure → points to overcharge, airflow issues, or compressor control problems. • High low-side and low/normal high-side pressure → almost always indicates a stuck expansion valve. I never guess—I diagnose AC problems using pressure patterns, airflow checks, and system design knowledge. When Both Low … Read More