Get the next safe steps from a photo or video.

What I see

Trane outdoor unit with spine-fin coil, probes connected, and visibly dirty coil. Pressure behavior indicates low-pressure protection trip after startup.

Safety first

Panel is open with live high-voltage components. Keep clear of contactor and capacitor terminals, fan blade, and avoid refrigerant venting while handling probes.

Diagnosis + next steps

• 1
  Confirm diagnosisLow suction + low head + near-zero subcooling indicates severe loss of charge, not restriction.
• 2
  Leak search outdoor firstInspect spine-fin rub points and accumulator underside for oil marks/shiners.
• 3
  Then inspect indoor evaporatorIf outdoor is clear, move to evap coil as common leak source.
• 4
  Pressure test properlyRecover charge and perform standing nitrogen pressure test (300+ PSI) to locate leak.

Watch for

Standing pressure only means some refrigerant is present, not that charge is correct. Do not top off before locating and repairing the leak source.