HVAC TIP OF THE DAY “Airflow Before Refrigerant — Always.” Before you ever touch gauges or add refrigerant, verify airflow: Clean filter Clean evap coil Proper blower speed Correct static pressure Low airflow will fake low refrigerant symptoms, leading to: Overcharging Compressor overheating Premature system failure Voidable warranty issues ✅ Diagnosis Rule: If airflow isn’t proven first, the refrigerant diagnosis is invalid.