Posts Tagged: AC system troubleshooting
Evaporator Coil Testing: How to Find Hidden AC Leaks Fast
How to Diagnose Evaporator Leaks Without Guessing Quick Summary The evaporator is buried inside the dash, so guessing doesn’t cut it. The most reliable ways I use to test an evaporator coil for leaks include an electronic leak detector, UV dye, vacuum testing, and targeted visual inspection. If you skip proper testing, you risk tearing apart a dashboard for nothing. Done correctly, evaporator coil testing tells you with confidence whether the evaporator is actually the problem. Why Evaporator Coil Testing Is One of the Hardest AC Diagnoses I’ll be straight … Read More
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